Added categories constant to model
Fixed categories constant
Moved data from model to seeds for categories
Categories show displays posts of that category
Added count methods for comments and posts
Added method to check if category exists
Added top 8 method to category model

* Top 8(currently just a sample) shows on root
* Changed root route to home#index
Fixed spelling in seed category data
Added view_counter to posts table
Merge branch 'categories' into development

Conflicts:
	db/schema.rb