Add polymer template checker

For details how to use it see the polygerrit-ui/README file.

Twinkie patch note: the template checker uses twinkie library for
checking. The library has a bug, that stops checker from working. As a
temporary workaround, the patch is added directly to this change. The
patch will be removed after fixing bug in twinkie library.

Change-Id: I3375d6654478e12eeb1df9a2b912125f6929838c
diff --git a/yarn.lock b/yarn.lock
index 45b4f2c..faa1e99 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1082,6 +1082,11 @@
   resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.4.tgz#f0ec25dbf2f0e4b18647313ac031134ca5b24b21"
   integrity sha512-1z8k4wzFnNjVK/tlxvrWuK5WMt6mydWWP7+zvH5eFep4oj+UkrfiJTRtjCeBXNpwaA/FYqqtb4/QS4ianFpIRA==
 
+"@types/minimatch@3.0.3":
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
+  integrity sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==
+
 "@types/minimist@^1.2.0":
   version "1.2.1"
   resolved "https://registry.npmjs.org/@types/minimist/-/minimist-1.2.1.tgz"
@@ -2356,6 +2361,11 @@
     raw-body "2.4.0"
     type-is "~1.6.17"
 
+boolbase@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
+  integrity sha1-aN/1++YMUes3cl6p4+0xDcwed24=
+
 bower-config@^1.4.0, bower-config@^1.4.1:
   version "1.4.3"
   resolved "https://registry.yarnpkg.com/bower-config/-/bower-config-1.4.3.tgz#3454fecdc5f08e7aa9cc6d556e492be0669689ae"
@@ -2432,7 +2442,7 @@
     widest-line "^3.1.0"
     wrap-ansi "^7.0.0"
 
-brace-expansion@^1.1.7:
+brace-expansion@^1.0.0, brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz"
   integrity sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==
@@ -2742,6 +2752,18 @@
   resolved "https://registry.yarnpkg.com/charenc/-/charenc-0.0.2.tgz#c0a1d2f3a7092e03774bfa83f14c0fc5790a8667"
   integrity sha1-wKHS86cJLgN3S/qD8UwPxXkKhmc=
 
+cheerio@1.0.0-rc.2:
+  version "1.0.0-rc.2"
+  resolved "https://registry.yarnpkg.com/cheerio/-/cheerio-1.0.0-rc.2.tgz#4b9f53a81b27e4d5dac31c0ffd0cfa03cc6830db"
+  integrity sha1-S59TqBsn5NXawxwP/Qz6A8xoMNs=
+  dependencies:
+    css-select "~1.2.0"
+    dom-serializer "~0.1.0"
+    entities "~1.1.1"
+    htmlparser2 "^3.9.1"
+    lodash "^4.15.0"
+    parse5 "^3.0.1"
+
 chokidar@^1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-1.7.0.tgz#798e689778151c8076b4b360e5edd28cda2bb468"
@@ -3253,6 +3275,16 @@
   resolved "https://registry.npmjs.org/crypto-random-string/-/crypto-random-string-2.0.0.tgz"
   integrity sha512-v1plID3y9r/lPhviJ1wrXpLeyUIGAZ2SHNYTEapm7/8A9nLPoyvVp3RK/EPFqn5kEznyWgYZNsRtYYIWbuG8KA==
 
+css-select@~1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/css-select/-/css-select-1.2.0.tgz#2b3a110539c5355f1cd8d314623e870b121ec858"
+  integrity sha1-KzoRBTnFNV8c2NMUYj6HCxIeyFg=
+  dependencies:
+    boolbase "~1.0.0"
+    css-what "2.1"
+    domutils "1.5.1"
+    nth-check "~1.0.1"
+
 css-slam@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/css-slam/-/css-slam-2.1.2.tgz#3d35b1922cb3e0002a45c89ab189492508c493e5"
@@ -3264,7 +3296,7 @@
     parse5 "^4.0.0"
     shady-css-parser "^0.1.0"
 
-css-what@^2.1.0:
+css-what@2.1, css-what@^2.1.0:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.3.tgz#a6d7604573365fe74686c3f311c56513d88285f2"
   integrity sha512-a+EPoD+uZiNfh+5fxw2nO9QwFa6nJe2Or35fGY6Ipw1R3R4AGz1d1TEZrCegvw2YTmZ0jXirGYlzxxpYSHwpEg==
@@ -3547,6 +3579,14 @@
   dependencies:
     esutils "^2.0.2"
 
+dom-serializer@0:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-0.2.2.tgz#1afb81f533717175d478655debc5e332d9f9bb51"
+  integrity sha512-2/xPb3ORsQ42nHYiSunXkDjPLBaEj/xTwUO4B7XCZQTRk7EBtTOPaygh10YAAh2OI1Qrp6NWfpAhzswj0ydt9g==
+  dependencies:
+    domelementtype "^2.0.1"
+    entities "^2.0.0"
+
 dom-serializer@^1.0.1:
   version "1.3.1"
   resolved "https://registry.npmjs.org/dom-serializer/-/dom-serializer-1.3.1.tgz"
@@ -3556,6 +3596,14 @@
     domhandler "^4.0.0"
     entities "^2.0.0"
 
+dom-serializer@~0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-0.1.1.tgz#1ec4059e284babed36eec2941d4a970a189ce7c0"
+  integrity sha512-l0IU0pPzLWSHBcieZbpOKgkIn3ts3vAh7ZuFyXNwJxJXk/c4Gwj9xaTJwIDVQCXawWD0qb3IzMGH5rglQaO0XA==
+  dependencies:
+    domelementtype "^1.3.0"
+    entities "^1.1.1"
+
 dom-urls@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/dom-urls/-/dom-urls-1.1.0.tgz#001ddf81628cd1e706125c7176f53ccec55d918e"
@@ -3572,11 +3620,23 @@
     clone "^2.1.0"
     parse5 "^4.0.0"
 
+domelementtype@1, domelementtype@^1.3.0, domelementtype@^1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.3.1.tgz#d048c44b37b0d10a7f2a3d5fee3f4333d790481f"
+  integrity sha512-BSKB+TSpMpFI/HOxCNr1O8aMOTZ8hT3pM3GQ0w/mWRmkhEDSFJkkyzz4XQsBV44BChwGkrDfMyjVD0eA2aFV3w==
+
 domelementtype@^2.0.1, domelementtype@^2.2.0:
   version "2.2.0"
   resolved "https://registry.npmjs.org/domelementtype/-/domelementtype-2.2.0.tgz"
   integrity sha512-DtBMo82pv1dFtUmHyr48beiuq792Sxohr+8Hm9zoxklYPfa6n0Z3Byjj2IV7bmr2IyqClnqEQhfgHJJ5QF0R5A==
 
+domhandler@^2.3.0:
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/domhandler/-/domhandler-2.4.2.tgz#8805097e933d65e85546f726d60f5eb88b44f803"
+  integrity sha512-JiK04h0Ht5u/80fdLMCEmV4zkNh2BcoMFBmZ/91WtYZ8qVXSKjiw7fXMgFPnHcSZgOo3XdinHvmnDUeMf5R4wA==
+  dependencies:
+    domelementtype "1"
+
 domhandler@^4.0.0, domhandler@^4.1.0:
   version "4.1.0"
   resolved "https://registry.npmjs.org/domhandler/-/domhandler-4.1.0.tgz"
@@ -3584,6 +3644,22 @@
   dependencies:
     domelementtype "^2.2.0"
 
+domutils@1.5.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/domutils/-/domutils-1.5.1.tgz#dcd8488a26f563d61079e48c9f7b7e32373682cf"
+  integrity sha1-3NhIiib1Y9YQeeSMn3t+Mjc2gs8=
+  dependencies:
+    dom-serializer "0"
+    domelementtype "1"
+
+domutils@^1.5.1:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/domutils/-/domutils-1.7.0.tgz#56ea341e834e06e6748af7a1cb25da67ea9f8c2a"
+  integrity sha512-Lgd2XcJ/NjEw+7tFvfKxOzCYKZsdct5lczQ2ZaQY8Djz7pfAD3Gbp8ySJWtreII/vDlMVmxwa6pHmdxIYgttDg==
+  dependencies:
+    dom-serializer "0"
+    domelementtype "1"
+
 domutils@^2.5.2:
   version "2.5.2"
   resolved "https://registry.npmjs.org/domutils/-/domutils-2.5.2.tgz"
@@ -3767,6 +3843,11 @@
   dependencies:
     ansi-colors "^4.1.1"
 
+entities@^1.1.1, entities@~1.1.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/entities/-/entities-1.1.2.tgz#bdfa735299664dfafd34529ed4f8522a275fea56"
+  integrity sha512-f2LZMYl1Fzu7YSBKg+RoROelpOaNrcGmE9AZubeDfrCEia483oW4MI4VyFd5VNHIgQ/7qm1I0wUHK1eJnn2y2w==
+
 entities@^2.0.0:
   version "2.2.0"
   resolved "https://registry.npmjs.org/entities/-/entities-2.2.0.tgz"
@@ -5355,6 +5436,18 @@
     relateurl "0.2.x"
     uglify-js "3.4.x"
 
+htmlparser2@^3.9.1:
+  version "3.10.1"
+  resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-3.10.1.tgz#bd679dc3f59897b6a34bb10749c855bb53a9392f"
+  integrity sha512-IgieNijUMbkDovyoKObU1DUhm1iwNYE/fuifEoEHfd1oZKZDaONBSkal7Y01shxsM49R4XaMdGez3WnF9UfiCQ==
+  dependencies:
+    domelementtype "^1.3.1"
+    domhandler "^2.3.0"
+    domutils "^1.5.1"
+    entities "^1.1.1"
+    inherits "^2.0.1"
+    readable-stream "^3.1.1"
+
 htmlparser2@^6.0.1:
   version "6.1.0"
   resolved "https://registry.npmjs.org/htmlparser2/-/htmlparser2-6.1.0.tgz"
@@ -6498,7 +6591,7 @@
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
   integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
 
-lodash@^4.0.0, lodash@^4.11.1, lodash@^4.16.6, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.2, lodash@^4.17.20, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.3.0:
+lodash@^4.0.0, lodash@^4.11.1, lodash@^4.15.0, lodash@^4.16.6, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.2, lodash@^4.17.20, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.3.0:
   version "4.17.21"
   resolved "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
@@ -6901,6 +6994,13 @@
   dependencies:
     brace-expansion "^1.1.7"
 
+minimatch@3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
+  integrity sha1-Kk5AkLlrLbBqnX3wEFWmKnfJt3Q=
+  dependencies:
+    brace-expansion "^1.0.0"
+
 minimist-options@4.1.0:
   version "4.1.0"
   resolved "https://registry.npmjs.org/minimist-options/-/minimist-options-4.1.0.tgz"
@@ -7172,6 +7272,13 @@
   dependencies:
     path-key "^3.0.0"
 
+nth-check@~1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/nth-check/-/nth-check-1.0.2.tgz#b2bd295c37e3dd58a3bf0700376663ba4d9cf05c"
+  integrity sha512-WeBOdju8SnzPN5vTUJYxYUxLeXpCaVP5i5e0LF8fg7WORF2Wd7wFX/pk0tYZk7s8T+J7VLy0Da6J1+wCT0AtHg==
+  dependencies:
+    boolbase "~1.0.0"
+
 number-is-nan@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
@@ -7527,6 +7634,13 @@
   resolved "https://registry.yarnpkg.com/parse-passwd/-/parse-passwd-1.0.0.tgz#6d5b934a456993b23d37f40a382d6f1666a8e5c6"
   integrity sha1-bVuTSkVpk7I9N/QKOC1vFmao5cY=
 
+parse5@^3.0.1:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/parse5/-/parse5-3.0.3.tgz#042f792ffdd36851551cf4e9e066b3874ab45b5c"
+  integrity sha512-rgO9Zg5LLLkfJF9E6CCmXlSE4UVceloys8JrFqCcHloC3usd/kJCyPDwH2SOlzix2j3xaP9sUX3e8+kvkuleAA==
+  dependencies:
+    "@types/node" "*"
+
 parse5@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/parse5/-/parse5-4.0.0.tgz#6d78656e3da8d78b4ec0b906f7c08ef1dfe3f608"
@@ -9882,6 +9996,16 @@
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
   integrity sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=
 
+twinkie@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/twinkie/-/twinkie-1.1.2.tgz#c301e4fc26d00d61d3d7e5be030dc6a2264271da"
+  integrity sha512-4KwhyrcrRb0WWJKMX/aT+npmMZC0h+sA//+bLhNupmuKvesrH2vEZDe6yIr48FMWKEsdA2xNdQqw/3MapZ5qXQ==
+  dependencies:
+    "@types/minimatch" "3.0.3"
+    cheerio "1.0.0-rc.2"
+    minimatch "3.0.3"
+    typescript "4.0.5"
+
 type-check@^0.4.0, type-check@~0.4.0:
   version "0.4.0"
   resolved "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz"
@@ -9939,6 +10063,11 @@
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
+typescript@4.0.5:
+  version "4.0.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.5.tgz#ae9dddfd1069f1cb5beb3ef3b2170dd7c1332389"
+  integrity sha512-ywmr/VrTVCmNTJ6iV2LwIrfG1P+lv6luD8sUJs+2eI9NLGigaN+nUQc13iHqisq7bra9lnmUSYqbJvegraBOPQ==
+
 typescript@4.1.4:
   version "4.1.4"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.4.tgz#f058636e2f4f83f94ddaae07b20fd5e14598432f"