Merged latest changes from http://github.com/jhuckabee/drupal-exhibit (04d7fc0) by jhuckabee.

Changelog (Exhibit Views):
- Added handling for taxonomy terms added through relationships.
- Added explicit isset() predicates to avoid E_STRICT notices.
- Replaced the exhibit_views module with native Views2 integration.
- Automatically add Views created Exhibit Feeds to Feed lists.
- Updated documentation with new Views2 usage.