Issue #4 Create backend User resource

Adding bio, role, and featured properties to the user model, along with
default values
Merge pull request #51 from FelixNemis/user-properties

Adding bio, role, and featured properties to the user model, with defaults
Added primary attr to tags, default of false
Merge pull request #57 from sethetter/add-primary-to-tags

Closes #54 - Added primary attr to tags, default of false