Added Comment.rb model & corresponding controller
Comment validation added for logged in users
Added comments form to show Tasks view
Added task_id column to Comments table
Added user_id column to Comments table
Comment form: user & task id's hidden fields work
Comments working for individual tasks
New & Delete comment features return to task/show
Merge branch 'master' into sam

Conflicts:
	app/controllers/comments_controller.rb
	app/controllers/tasks_controller.rb
	app/models/comment.rb
	app/models/task.rb
	db/schema.rb