integration of google analytics within droidplanner.
fixed issues preventing google analytics from dispatching recorded hits.
cleaned up the styles resource file.
added preference to disable usage statistics reporting.
added 'up' navigation button to the settings screen.
Added 'mode details panel' usage tracking.
created package for analytics related code/logic.
added a Category enum to store all analytics related categories.
Merge branch 'feature_analytics' of https://github.com/ne0fhyk/droidplanner into glass

Conflicts:
	Android/src/org/droidplanner/android/fragments/SettingsFragment.java
	Android/src/org/droidplanner/android/utils/DroidplannerPrefs.java