add omniauth-twitter gem
add twitter credentials file
store player id on session
add dashboard and session controllers
use find_or_create_by_twitter_id generated by rails
Merge branch 'master' into add_omniauth_gem

Conflicts:
	app/models/player.rb
Merge pull request #1 from Moove-it/add_omniauth_gem

Add omniauth gem for twitter connection