Removed outdated model files and updated comments.

--amend:  Forgot to include changes to .pro file.
Merge branch 'DB_Branch_5-30-14' of https://github.com/lansdon/cpts483_drc into DB_Branch_5-30-14
Used new Fruit files, and changed WhatLastError.

Ultimately, the WhatLastError method only returned any

errors that occurred with the database.  Instead, replaced

method with one that returns errors encountered by our

query objects which is far more relevant.