Update readme with more details

Change-Id: I7e92da32cc71c839d92f0349f4cd68553535695d
diff --git a/README.md b/README.md
index a01cad1..b75a1bf 100644
--- a/README.md
+++ b/README.md
@@ -47,9 +47,30 @@
 4. injectJsCode: inject any js code to the page
 5. injectJsPlugin: inject a js plugin(url) to the site
 6. injectHtmlPlugin: inject a html plugin(url) to the site
+7. injectJsModule: inject a js module file to the site (type="module" will be added when load script)
+8. addReqHeader: to add arbitrary header when you send a request
+9. addRespHeader: to add arbitrary header when you receive a request
+10. rRespHeader: to remove arbitrary header on any response
 The two options of injecting any plugins meant to help you develop your plugins for your gerrit sites.
+#### How to use dev helper with html plugins
+Use `injectHtmlPlugin` rule or use `redirect` rule if its an existing html plugin.
+#### How to use dev helper with js plugins
+For single-file js plugins, use `injectJsPlugin` rule or use `redirect` if its an exising js plugin.
+For multi-file modularized js plugins (you have import / export in source code), you have two options:
+1. compile them and then treat it as single-file js plugin
+2. or if you want to load source code as it is
+  - use `injectJsModule`, this will load the js with `type="module"`, and due to restriction of `type="module"`, Gerrit won't be able to recognize the plugin without a proper url set when calling `Gerrit.install`, so you also need to tweak your code to call `Gerrit.install(callback, undefined, 'http://localhost:8081/plugins_/checks/gr-checks/gr-checks.js')` to let Gerrit treat it as a legit plugin
+  - or you can create a temporary html plugin which loads the `http://localhost:8081/plugins_/checks/gr-checks/gr-checks.js` with `type="module"`, and then treat it as a html plugin
+Either way, you need to block the existing plugin if its already on the page.
 ### Contact
 Please don't hesitate to contact taoalpha@google.com for support on this extension.
\ No newline at end of file
diff --git a/release-notes.md b/release-notes.md
index 55a73cb..6f06654 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -1,3 +1,7 @@
+#### next release
+- Add addRespHeader operator, thanks to Edward <ehmaldonado@google.com>
 #### v0.0.7
 - Fix the issue when multiple rule matches one url for onBeforeRequest