General Improvements 26-03-2013

- Changed theme to Light and HoloLight(api11+)
- Changed Pie Chart labels colour to black to accomodate new theme
- Date output on training log screen changed to DD-MM-YY (instead of
YYYY-MM-DD) and size changed to 9sp (from 11sp)
- Refactored variable and method names in most classes to make the code
more readable
- Duplicate code deleted