EmbeddedDocumentFormSet should inherit from BaseInlineDocumentFormset
making parent_document into a keyword argument on EmbeddedDocumentForm to avoid a problem with formsets
trying a different approach with patchin EmbeddedDocumentFormSet
hurble duh and fries
The save method on EmbeddedDocumentFormSet should simply replace the embedded field with the new values - details are in a comment
Merged #29