Adds controller example using doubles factory (doesnt exist)
fixes uninitialized constant DoublesMatchesController
Adds FactoryGirl (still failing)
Adds matches factory (still failing)
Adds player factory (still failing)
Adds doubles_match factory (still failing)
Adds team factory (still failing)
STI'd players as opponents and adds Teams (still failing on association)
Fixes tests (still have driving test fail)
Starts implementing a way to differentiate doubles matches from singles matches
Adds duplicate test at the model level to implement feature
No longer giving an error but instead a failing expectation
error now about wrong records returned
Fixes failing specs (running green)
Assert that some match info appears in view (fails)
Reafactors away Player's display_name

Instead overide the default string representation of Opponents (Players &
Teams)
Extracts partial of common code (all tests pass)