Initial Commit
Tablet UI updates, all original features implemented, time to start the hard work.

Tablet UI:
- Instead of using a date picker dialog, replace the change contract end date button with a date picker.
- Spread out ui elements on larger screens.
Fixed bug in etf calculation for Verizon and At&t, Set default ETF to $0.00.
Removed some debug code
Handled ads programmatically rather than using a layout for more control and less nagging from Android Studio about a missing class.
Use child fragment manager to show the date picker on Calculator section which causes it to be destroyed when changing sections.
Added My Devices section, changed naming scheme of section layout files
Add my private admob settings to .gitignore
Fixed the date picker fragment on small screen devices.
Corrected spelling error