#2061 - Remove Uploadify from add_photo_form/add_photo_form_completed events.
- Added code around event calls in uploader to add Uploadify-specific JS to update the inputs.
- Removed Uploadify JS from tag_event.  Now it's uploader-agnostic.
- Refactored tag_event autocomplete code (no functional changes).
Merge pull request #216 from shadlaws/fix_2061

#2061 - Remove Uploadify from add_photo_form/add_photo_form_completed events.