Devise\Media\Categories
Classes
Class CategoryPaths converts dot paths to real paths
and also finds server paths and browser urls to the configured
root media directory where all our media files are stored at.
Class Manager manages categories. A category is basically
a directory inside of the /media folder.
Class ResponseHandler handles the controller side
of managing categories. These methods are likely
referenced in dvs_pages table
Exceptions
Class CategoryAlreadyExistsException is thrown
whenever the Categories/Manager finds a duplicate
category. (If you try to create the same directory)