added application controller methods to authenticate user and to return to previous location after logging in
skip store_path filter in sessions controller
authenticate user before creating a reputation
skip store_path before filter on reputations controller
link user picture on post a link to user profile
add id attribute to popup helper
send id value to popup helper in login popup
added close link to login popup
added custom popup plugin and applied to login links
added .loginPopupLink css class to post voting links
added helper method to add .loginPopupLink css class if no current_user
added login_popup_class helper method to post pin and report links