added gitignore
remove gitignore to add to master branch instead
set up tests for Game class
Merge branch 'master' of github.com:mathiasarmstrong/Rock_paper_scissors into game_class

Conflicts:
	spec/spec_helper.rb
set up Game class and passed tests
added test for #check_winner
added -1 default value for winner in Game class
Merge pull request #10 from mathiasarmstrong/game_class

Game class