Introduced Membership model to all for many-to-many relationship between aPlayer and Team.
changed the joiner table b/w Player and Team from Membership to Contract
Added ContractsController, Contracts view folder, etc. and corresponding spec file. Added index and root file to get to hello world
Added contract_spec in lieu of membership_spec. Got to hello world with rspec
added shoulda matchers to gem file to facilitate rspec testing
add association tests to each of 3 models
Adding before(:each) seed in order to have more meaningful model tests
refactored before(:each) rspec method in Team model. Does NOT work yet..instance variable is not accessible in other instance methods