Updates Availibility table headings to dates using strftime.
Updates Availibility table to display basic choice object to appropriate User row.
adds code to accommodate for no end date in the show ES page
Adds option to invite people in the new ES form through checkboxes and removes current user from list of invitee options
Adds initial EventChoices controller.
Merge branch 'master' into shehryar
Adds EventChoice selection checkboxes for each Event in EventSuggestion. Currently deleting all previous choices when new one is created. Also removes EventChoice Controller.