initia offline mode changes
changes to persist unsaved scores
refactored code for long click
handling offline mode, internet connection is not available
adding offline mode, refactoring code
Merge branch 'master' into feature/offline_mode

Conflicts:
	src/com/education/flashmath/SubjectActivity.java
	src/com/flashmath/activity/LongActivity.java
	src/com/flashmath/activity/ResultActivity.java
Move new classes into new package structure
Merge pull request #22 from arolan/feature/offline_mode

Feature/offline mode