Add default arguments, name gitlab repo gl, suggest dotfile repo.
Add default arguments, name gitlab repo gl, suggest dotfile repo.

8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr,8thcolor/eurucamp2014-htdsadr,8thcolor/rubyconfau2015-sadr,8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr