Development Alpha 0.22.0

- MIGRATION: add_rating_to_experts_table
- Administrators are now able to approve and reject pending expertise
requests for users
- Configured the system to be able to send SMTP mail in development mode
- Pending expertise are now clearly visible for Administrators when
viewing users
- Zipcodes are now included in the expertise panel on the Administration
View User page
- Category details are now included in the Expertise panel on the
Administration View User page
- Users can now search for experts by both Zip and Category
- Added a Categories dropdown to the Find an Expert page
- Experts are now properly displayed on the Find Experts page when they
are found for the given criteria
- Added the Gizmo webfont library
- User's preferred zipcode will now be updated in the DB and Session
when choosing a zip to search for an expert with