added Timestamps table for tracking when increments are made; added code for updating this table, including validation/checking of the results
added action bar buttons and methods for onDestroy, onPause and onResume
Action bar button Export saves db to external storage
adding activity to add item
adding activity to add item
added class and layout for new item activity
add item activity now launches
fixed some merging issues
these changes appear to be automatically added by Eclipse
merged conflicts