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.