added spec files for sessions controller and user&classgroup models, added spec and rails helper
added classgroup controller spec; started user/classgroup spec
attempting to write some tests
class_group_controller
add nickname to user (github login name)
update class group tests
added require_login method, added before_action filter
added optional skip_before_action for sessions_controller
changed current_user to @current_user
removed 'before_action :require_login' and placed it in users controller
modified current_user without instance variable declaration
Added iconic-foundation stylesheet outside of .gitignore
Removed whitespace for routes.rb
Linked Top Right click clack button to home  instead of current page
changed flash name from error to error_github
removed before_action for logged_in
Added user sign in for github
Commented out this old section; moved to welcome#index
Added logged_in user to check via !!current_user
Whitespace check