Update changelog, bump version for beta
Add signing config to build.gradle
Allow JDK 7 for release build
Update .gitignore
Minor improvements

-Load javascript only when required
-Disable EditText during calculations.
Move gson models to separate package
Add cupboard lib
Add initial DB code
Update build.gradle
Move Cell Lists to different layout

-Also, added empty view for display in tablets(needs testing)
Make Cell Parcelable(For Dialogs)
Simplify some methods in SageSQLiteOpenHelper
Add rest of DB code
Migrate rest of Code over to using DB

-TODO: This breaks saving on orientation change completely.
Remove old code from Cell
Move Cell Deletion into its own Dialog
Misc Cleanup
Fix cell edit and delete

-Also fix refreshing on deletion/edit
Rename and modify XMLParser for new Cells
Remove unnecessary classes