Added attending users to workout view
User can see pending workout invites at workouts index view
Added confirmed boolean to Invitation model
Fixed Associations and added UserWorkouts table
Minor changes to nav flow. Refactored Workouts index with partials
Refactored Workouts index with partials
Added Awaiting Confirmation section to workout page. Doesn't work yet
Added invite method back to workouts controller
Show pending invites on Users home page and awaiting confirmation on workout page
Recreated Invitations Controller - spelling mistake
Fixed invitations controller spelling mistake, created show page for Ivites with accept or decline options
User can accept a pending invitation and workout is added to their schedule
User can decline an invitation and the invitation is deleted.
Merge branch 'workout_invites'

Conflicts:
	app/controllers/workouts_controller.rb