Updated activity handler test
Added enabled flag
Pass now time as parameter to update activity state
Added enable flag in activity handler
Stop or start session with enable
Added tests for enable
Added isEnabled method to Adjust
Added test for isEnabled
Changed comment of isEnabled
Added enabled to serialization
New version
Refactoring
Sent at added
Added Google Play Services ad id
Updated README with disable tracking
Corrected README syntax mistake
Merge pull request #42 from adjust/version3.2

Version3.2