Model._fields now tracks fields
Model setattr now uses _fields
Model getattribute now uses _fields
Abstracted register logic into database.register_model, abstracted creation of worksheets to get_or_create_worksheet
Merge branch 'master' into mockdb

Conflicts:
	fuckitdb/fuckit.py
	tests/test_model.py
Abstracted model data calls to database methods
More work on MockDB
Added row_values() and get_all_values() to DB
Completed MockDB functionality, all tests passing
Consolidated tests to tests.py
Removed erroneous import and added line before cell class for pep8
Merge pull request #3 from Widdershin/mockdb

Mockdb
Updated readme to have license information and build status
Removed old testdata file
Removed 3.3 testing from travis.yml until gspread support for 3.3
Added develop badge and labels for build status
Merge pull request #4 from Widdershin/develop

Develop