Remove the category column from "Jobs".
Adding Categories model.
Adding has_many relationship between jobs and categories.
Adding a method to fetch all parent categories + Test for category model.
Adding Category association to jobs factory.
Adding validation to jobs that a category must be presence.
Modified  the jobs creator spec to use the new category association. Removed whitespaces.
Added a category creator + spec.
Modified the latest_active.html.erb to play nice with the latest addition to categories.
Merge branch 'feature/categories' into develop