[categories] Categories List

* Categories List
* Category Entity
* Mount Category endpoint
[strong-params] Enable strong params for scoped data
[category] GET by ID, POST, PUT and DELETE
Remove bower tracking folder on application.rb
Remove Tests for the old documentation
Remove bower swagger images
[categories] Tests for GET by id, PUT, POST and DELET
Fix Houndci Comments
Merge pull request #17 from pragmaticivan/categories-api

Categories api