run rspec:install
add resource routes for categories, posts, comments, and votes
add shoulda matchers
create comments_controller
begin tests for comment model
test validation failure
add factory girl
add faker
factories for testing
test association with post;
add test for has_many votes
test votes association
start testing for controllers
begin testing comments controller
add index method
view for comments index
test for new comment
indenting
add new method
blank view for new comment