Added simple mimetype mapping
minor change
added validity check for mimetypes
Merge pull request #8 from ajstanley/7.x

7.x
Drupal Coding Standards Compilance
Do not display the "Batch Import Objects" on objects that can't contain children.

This should be revised so that books and other compond objects can take
advantage of this as well.
Merge pull request #9 from nigelgbanks/7.x-coder-standards

7.x coder standards