Activity result handler added to StoreController
Updated the README to include this step.
The handler needs to be called by the activity which opens the store; tries to access Google Play functionality, not just the internal SOOMLA storage. This call has been added in the SoomlaAndroidExample's StorePacksActivity.
We might want to call StoreController.storeOpening in StoreExampleActivity too, so that purchases that completed while the application was inactive can be refreshed.
Leaving the compile error in StoreExampleActivity alone - it's probably there to attract attention to the point that the key/secret needs to be updated.

In SoomlaAndroidExample, minSdkVersion seems to need to be updated to 11 to support certain functions used in the *example* which are not available below that API LEVEL.
The example's project.properties also seems to require adding the SoomlaAndroidStore proejct as a dependency:
android.library.reference.1=../SoomlaAndroidStore
Was this left out to force the learner to realize they may need to perform this step for their own projects?