Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Upgrade bazlets to latest stable-2.15 to build with 2.15.19 API
  Upgrade bazlets to latest stable-2.14 to build with 2.14.21 API

Change-Id: I91203e3625aac694c4cf897d6e469d9e665f76dd

.bazelversion

diff --git a/.bazelversion b/.bazelversion
index 9084fa2..fd2a018 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-1.1.0
+3.1.0

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index c718333..56dd2ff 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "9af263722b7eafe99af079d6ef7cf1de23e6f8d7",
+    commit = "fff6f20bb2eceaf872a8acf8ad51471c25a82d38",
     #local_path = "/home/<user>/projects/bazlets",
 )
 

src/main/resources/Documentation/build.md

diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 213ebe6..b69f2d7 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -50,15 +50,6 @@
   bazel build plugins/@PLUGIN@
 ```
 
-Note that due to a [known issue in Bazel][bazelissue], if the plugin
-has previously been built in standalone mode, it is necessary to clean
-the workspace before building in-tree:
-
-```
-  cd plugins/@PLUGIN@
-  bazel clean --expunge
-```
-
 The output is created in
 
 ```
@@ -79,4 +70,3 @@
 [Back to @PLUGIN@ documentation index][index]
 
 [index]: index.html
-[bazelissue]: https://github.com/bazelbuild/bazel/issues/2797

tools/BUILD

diff --git a/tools/BUILD b/tools/BUILD
new file mode 100644
index 0000000..1fa2160
--- /dev/null
+++ b/tools/BUILD
@@ -0,0 +1 @@
+# Empty file - bazel treat directories with BUILD file as a package
\ No newline at end of file