This commit includes the following features:

	* filtering support is now complete - users can filter their list by department, status or do a search by name
	* going hand in hand with the filtering, the show shopping list feature allows the user to view only items that are low/out
	* item cell layout has been improved with ImageButtons instead of cell background colors to indicate item status
	* further ui enhancements include improved action bar with a "add item" button always visible and the "Shopping List" checkbox in the overflow menu
	* item cell buttons feature a white background to help unclutter the views
	* parse functionality is complete. Data is now saved/retrieved as the user adds/refreshes/edits data. It's possible that on disk storage can be utilized
	  to preserve system resources.

	TODO: recipes