Add gson and appcompat v7 to build.gradle

-TODO Eclipse.
Change midSdkVersion for AppCompat v7
Make CellData Parcelable

-Can now put CellData objects in Bundles(For DialogFragments)
-Renamed a few classes
-Removed some useless import statements(More left, probably leave till
the end)
CellDialog related fixes and cleanups

-New DialogFragment for Editing a Cell
-Cleaner CellListFragment
-Add new method to adapter for painless update
-Use AutoCompleteTextView during Cell edits as well