Standardize methods and extract to model.rb
Remove extraneous controllers
Add test for retrieving all projects in the system
Make some of Session tests pass
Update TODO and README
Add find_projects method
Minor fix in error messages
Redesign model instances to be self-sufficient

Previously, models needed a token and a connection object each time an
operation such as Model#delete! was called. This changes that such that
those two information are stored in the object upon creation.
Additional test for Model#find
Merge Token::create with Model::create
Update TODO
Allow direct creation of scoped token using credentials
Move test/fixtures to the more appropriate test/mock_data
Move TestFixtures to its own file
Make Model#[] not care if key is string or symbol
Use 'username' to alias the underlying 'name'
Remove attribute magic methods. They should all be accessed via Model#[]
Update mock data
Update redstack.yml.travis to make travis-ci happy again
Refactor Model::find