Redo Model Layer

[ethanmick]

Android also needs offline mode. All messages should be stored in SQLite.

http://ormlite.com/sqlite_java_android_orm.shtml

ORM Lite is an ORM for Java that can be used to map the objects to SQLite tables and columns. This means that all the networking also needs to go through the model.

http://jdeferred.org/

Can be used to create an almost identical interface to iOS, which would help our sanity in updating both platforms.

None of this is really Android specific, it's just working with Java, networking, and sqlite to create a robust model layer.