Version bump to 0.8.0.pre
Updated to mysql2 0.3.13
Updated to contour 2.0.0
Updated to carrierwave 0.9.0
Preceptors are now listed alphabetically by last name in dropdowns, closes #1.
Reduced clutter on preceptors index
Added calendar icons to date input fields
Preceptor Form Updates, closes #2, #4, #5, #6.

**Preceptor Changes**
- Added example to degree field
- Added example `Other-Support.doc` to Other Support field
- Rank is now only editable by administrator and changed to dropdown with choices `Associate Preceptor` and `Full Preceptor`
- Added Biosketch and Curriculum Vitae to preceptor file uploads
Simplified headers to on show and edit pages to link back to the index removing the need for "View All" buttons
Removed whitespace
Configurable hospital list added to Hospital Affilation field, closes #3.
Replaced btn-danger with less intrusive btn-danger-inverse
Remove About from menu bar
Version 0.8.0 finalized