Allow users to be admins
Merge pull request #48 from LaunchAcademy/admin-role

Allow users to be admins
Use Pundit to authorize access to answers
Use Pundit to authorize access to comments
User Pundit to authorize access to users
Use Pundit to authorize access to questions
Verify Pundit authorization on all controllers
Merge pull request #49 from LaunchAcademy/pundit

Use Pundit for authorization
Add assignee to questions
Assignee can be set via the API
Multiple users can be fetched/filtered via the API
Questions can be assigned to admins by admins