added full functionality to event model--can now determine total price, price per guest-- also edited events controller and views to reflect new info--users cannot join an event of which they are admin as a guest--users can join an event if they are not the admin of the event --in this way they join as a guest.
fixed a bug
finished events model updates and view updates
added proper flash notice messages and new test event
fixed basic functionality for user nav
made minor edit to delete function
fixed merge conflicts