Moved Activities to activities package.
Moved models to models package.
Moved helper classes to helpers package.
Merge pull request #30 from jsjones27/directory_structure

Organize directory structure
Delete unnecessary files.
Merge pull request #36 from jsjones27/delete_files

Delete unnecessary files.
Update README.md
changed the Title for Inventory and grocery activities
Added UP navigation to the actionbar
Merge pull request #39 from jsjones27/up_navigation

Up navigation
Merge branch 'master' into database