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
Merge branch 'develop' into feature/simperium

Conflicts:
	build.gradle
	src/org/wordpress/android/GCMIntentService.java
	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/NotificationUtils.java
	src/org/wordpress/android/ui/notifications/NotificationsActivity.java
	src/org/wordpress/android/ui/notifications/NotificationsListFragment.java
	src/org/wordpress/android/util/WPRestClient.java
Use latest Simperium, and use volley lib included in Simperium
Fix note bucket name.
Fixed list fragment image view from not loading properly.
Removing old db-related notes code. No longer needed with Simperium.
Start Simperium right after we get a WordPress.com token. Experimenting with showing the PTR refresher while notes are first indexing... will probably just remove it since you should start seeing notes really quickly.