added comments instance variable for questions show action
showed all comments associated with specific question
allowed user to comment on question IF they're logged in
refactored the if statement checking to see if user is logged in
added new and create actions for the comments controller
look at commit above...
Merge branch 'master' into katia_trying_to_fix_shit

Conflicts:
	app/controllers/questions_controller.rb
	app/views/questions/show.html.erb
Merge pull request #5 from kbasma/katia_trying_to_fix_shit

adding comments to questions and adding answers to questions