Added function to update item qunatity.
Merge branch 'master' into gl_generate
Added constants for item quantities.
Made the constants static.
Make constants public.
Typo.
Reorganize variables in Item.
Added checkQuantity function.

Adds items to grocery list when they fall below threshold quantity.
Fix database access in ListItem.
Merge branch 'master' into gl_generate
Make code acutally object-oriented.
Check all listItem when Inventory is resumed.
Added comments.
Moved quantity checking to InventoryActivity.

It appears the database cannot be accessed outside of a context. Objects (specifically ListItem) could keep of the context they were created in.
Merge branch 'master' into gl_generate
Prevent duplicate items in lists.

Item ID is used as primary key.
Merge pull request #40 from jsjones27/gl_generate

Grocery list generation.