Development Alpha 0.23.0

- MIGRATION: create_projects_table
- Administrators are now able to add and edit Collective Types in the
system
- Administrators are now able to add and edit Project Roles in the
system
- Created a new Administrative page to control the Collectives and
Projects in the system
- Created the CollectiveController & ProjectControllers
- Updated the Find an Expert & Login/Signup footer links
- Find Expert page will now pull all experts where possible if no zip is
available to filter
- BUG FIX: Added a check to see if a user is authenticated before trying
to update their preferred_zip
- BUG FIX: Now able to get to the Find Expert page without being
authenticated