add voting to comment and post routes
add method to post model to sum total points for a post
add upvote and downvote routes for voting
add methods for upvoting and downvoting to the PostsController
add buttons for upvoting and downvoting as well as a point counter to views
add validation to Vote model to prevent a user from voting on the same item twice
modify CommentsController and Comment model to support point totals and upvote/downvote methods
add default value to the Comment model's total_points method
add default value to the Post model's total_points method
add comment upvote/downvote buttons
Merge branch 'voting' of https://github.com/AlexSYanai/zack-overflow into voting

Conflicts:
	config/routes.rb
Merge pull request #19 from AlexSYanai/voting

Voting works perfectly