refactored the events#show controller, events/show.erb, and events_helper
Added event owner and event edit restrictions with new and revised tests
removed unnecessary files and folders
changed the organizer validation in the events controller
added organizer display to event show page
added the four volunteer preferences sections teach-only, ta-only, either, neither
Added details textarea to events
manage organizers
additional test for manage organizers
Merge pull request #67 from jforbe/master

Refactored Event and Added Organizer