First draft for version 1.1
Cleaner way to handle requestStack in net-log
Added HAR collector helper
start can now take url arg if needed
Added tests for har.js. Updated documentation.
Change net-log startrequest raw event to modifyrequest.
Added examineresponse raw event
Changed the way contentloaded event is emitted.
Added loadstopped event.
Added documentation for loadstopped
Some fixes with HAR collector