Imported latest 6.x version (8e74bbc) from the GitHub development repository.

Changelog:
- Changed profile fields to use name instead of title (by jhuckabee).
- Implemented facet generator and ability to add facets to a generic Exhibit block (by jhuckabee).
- Fixed bug with inserting facet definition on exhibit node creation (by jhuckabee).
- Corrected the schema update for the new facet_definition field, and also added the field to hook_schema().
- Corrected capitalization to adhere to Drupal guidelines.
- Added CVS keywords in order to conform to Drupal coding standards.
- Removed spurious PHPDoc headers.
- Refactored hook_block(); cleaned up trailing whitespace here and there.