* JENKINS-36884# Analytics-tools plugin to integrated rollbar
Also includes infrastrucutre to inject HTML head tags and HTTP header by any plugin that implements BluePageDecorator
and appropriate jelly files.
* Doc update
* Wrapped rollbar JS code inside IIFE.
* Use rollbar-browser package and build browser bundle
* Fixes and doc update
- Stapler includei jelly tag needs escaping $
- Added missing dependency in gulpfile.js
- require should load browser-rollbar
vivek