Fix path issues with our new depreciated constants
- Get the base upload directory, regardless of single or multisite installation

- Get multisite template migration working correctly
- Update notices appropriately
- Include shortened version of get_upload_dir()
- Fix glob()

- Ensure single-column tables return as HTML in the $form_data['field'] array
- Add access denied for logged in users trying to snoop other PDFs
- Update PHP5.0/5.1 array_replace_recursive function