modify SteamUser. create /steam_user/index.
コントローラ毎に読み込むjavascriptを変えるよう変更
add user registration from steam group
Merge branch 'feature/user_registration' into develop
add gem for debug
Merge branch 'develop' of github.com:sunbowworld/teamgenerator-tomoe into develop

Conflicts:
	app/views/team/generate.html.haml