Transitioning into using GoogleMapV2

Also...
Group java classes to sub-packages.
Code refactoring and cleanup.
Use new maps debug keys.
Code doesn't compile yet.
Re-design the layout and make the app runnable.

The app does not draw any fixes yet.
FixOverlay will be deleted next as we don't need overlays in Maps v2.
The logic there will be moved to another class.
Add the calendar view as a submodule.
Finish migrating to Map v2.

A non-trivial piece of logic removed for now is to draw fewer fixes when zoom level is high.
We should consider pre-compute the distances and persist the results in the datastore.
merge conflicts
fix Readme