Install rspec

Add rspec gem to the project.
Implement tests for player creation

Write 2 test cases for creating a new player: one with correct info, and
one with mismatched password.
Update main application view to include flash messages.
Update comment in creating player test
Implement a test for player viewing

Install factory_girl_rails and create factory for player.
Create a test for viewing player.
Update player's index view with DOM id for each player-action link.