Use number picker for screen wake length time
Bump minSdkVersion to 14
Rename module
Set new min and max values for screen wake length
Move billing items to xml array
Cleanup
Bump max screen wake length even higher
Extract billing to seperate method and add some error handling
Fix NumberPicker initialization bug
Use new method to expand status bar on 4.2.2 and up; fixes #36
Bump version for release