Improved wordpressConfig gradle task

- Better handling of missing local.properties file
- Rebuilds whenever local.properties has been modified
Set up simperium library and buckets
Note managed by Simperium

Switches the Note to be completely managed by default Simperium stack. This
means any note stored in the current DB will be abandoned and left in the old
DB.

This works since Notes are treated as transient data. Using your own datastore
is something Simperium needs to handle better.
Integrating notes bucket with ListView
GCMIntentService should try to work with the bucket now
Remove unneeded networking and related code

Thanks Simperium
Start buckets once user has been authenticated
Sync note unread count with simperium
Merge branch 'develop' into simperium

Conflicts:
	build.gradle
	src/org/wordpress/android/WordPress.java
	src/org/wordpress/android/WordPressDB.java
	src/org/wordpress/android/models/Note.java
	src/org/wordpress/android/ui/notifications/NotificationsActivity.java
	src/org/wordpress/android/ui/notifications/NotificationsListFragment.java
Update note last seen time whenever the adapter is refreshed
Merge branch 'issue/545-update-gradle-android-0.7' of github.com:wordpress-mobile/WordPress-Android into simperium
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-Android into simperium
Updating to latest simperium
Merge remote-tracking branch 'origin/develop' into simperium
Cleaning up some comments
1st pass at reader blog detail (view all reader posts in a specific blog)
2nd pass at reader blog detail (view all reader posts in a specific blog)
Reader blog detail now works, still lots of UI/integration work left to do
Reader blog detail is now shown from avatar on reader post list and comment detail
Fixed bug that caused the blog URL not to be set for posts returned by a /sites/ endpoint