Removed code pausing banners in delegate callbacks. This is not required.
Updated iOS release notes for 1.39
Minor AdMob version change
Changed js interface note on android guide.
Added some documentation to explain passing userid in currency manager init for android
updated android event listener docs.
How to increase and decrease reward currency
Merge pull request #40 from burstly/iOS-1.39

Merge iOS 1.39 changes
Merge pull request #41 from burstly/dev

Merge dev to master for iOS 1.39 changes