Merge pull request #14 from charettes/order-with-respect-to

Added an `order_with_respect_to` option.
Add subset ordering documentation
Merge pull request #18 from yuvadm/order-with-respect-to-docs

Add subset ordering documentation
Extend the ordered_model to also support manytomany relationships.
Add tests for the new manytomany relationship and update documentation.
Update README.md

In the documentation: add the ordering option in the Inline so the items are in the correct order.
Half implemenation of the admin.py model.
Merge branch 'master' of https://github.com/sturmf/django-ordered-model

Conflicts:
	README.md
Remove obsolete test data.
Reworked the admin.py to new source.
New tests for manytomany relationship.