Various changes to finish off the overall steam login strategy

* Removed omniauth as default strategy -- it's not needed
* Removed *= require_tree . from app*scss as it breaks bourbon
* Added @import on required stylesheets as a consequence
* Added before_action on app*ctrl ensure_signup_complete
* Added update method to users*ctrl
* Commented current_user.skip_reconfirmation! for steam email setting
* Edited notice on the redirect to prompt email address for activation
* Changed devise/reg*/edit view for testing purposes
* Added conditional links to navbar with signin/out and steam login
* Updated routes with devise_scope on :user strange doesn't want :users
* Added :update to users route whitelist