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added is_admin method
added if/else conditional to comments#create
added all actions for categories controller, move on to create views
moved is_admin method to a helper file
included category helper module
minor change to category routes
changed categories view name all to index
rebasing
updated branch
fixed helper method to account for empty role
added categories#show link
beginning categories#update view
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Updated migration successfully
updated by removing merge conflicts
updating branch