New Archive screen functionality and minor fixes

26/3/13:

- 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

01/04/13:
- Fixed monthly date display - was not showing correct date format after
sorting
- Changed order of entry on record screen and changed 'Comments' to
'Name Activity' to emphasize its importance
- Changed display of listview to give Name precedence, 'm' changed to
'mi'
- Graph screen title bar now displays month and year, deleted redundant
textview monthyear

07/04/2013
- Training log screen changes - added longclick for delete, entries now
clickable for detailed information, displays message when there are no
entries in the list
- Graph - added menu for switching between graphs, line graph code
started (unfinished and unused currently)
- MainActivity moved (renamed) to MainMenu class

TODO:
- Format new listview detailed information screen
- Add edit option to listview onlongclick
- Add time, intensity, notes to record and database
- Add recent suggestions for name, notes on record screen
- Implement yearly line graph (possible from custom date ranges)