Logging debug message and small issue with checking for empty state.
Merge branch 'master' of github.com:soomla/android-store

* 'master' of github.com:soomla/android-store:
  Added SoomlaEvent to support saving the event Sender. More events use itemId instead of actual item.
  Rebuilt library
  Updated example with semantic changes and creating mutable data structures in initializeWithStoreAssets
changes in example: pointing to the correct google-play jar and fixed event handler log messages