User can create categories

User can create a category
User can view a category
User can edit a category they created

Added error partial to views/application
A user can delete categories he or she created.
create comment partial, migrate db, update models
Make comments on posts polymorphic

-make comments polymorphic
-make replies controller for comments that reply to other comments
-make new routes for comments and replies
Make replies#create, display comments in nested lists
fix routes formatting