Improve handling of validation.

...  May affect the use of more than one step in the future, but
we should be good for a while.
Remove some commented out code.
Merge pull request #3 from discoverygarden/7.x-validation

 Improve handling of validation.
Filename conventions.

Also changed the class loading mechanism to use Drupal 7 class loading.
Merge pull request #4 from nigelgbanks/7.x-filename-conventions

Filename conventions.
Remove Scholar-specific importers.
Merge pull request #5 from adam-vessey/7.x

Remove Scholar-specific importers.
Load required include.
Merge pull request #6 from adam-vessey/7.x

Load required include.
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
Merge remote branch 'upstream/7.x' into flvc