Custom primary key types of related Django models weren't handled
Test commands pass output capture control to py.test
Relation fields may be set optional
Additional assert for not found module case
twisted didn't accept capture option
Merge pull request #348 from DXist/feature/get_field_type_for_relation_fields

Feature/get field type for relation fields
Resolves #316 by correcting variable name typo.
Test of len(header_doc) should be len(header_class) since it is the value used to create the headers list.
When header_doc is a simple lxml.Element with no children, len(header_doc) == 0.
Adds TestSoapHeader unittest.
Merge pull request #349 from ffreckle/master

Simple SOAP headers now working -- Resolves #316 by correcting variable name typo.
Merge remote-tracking branch 'arskom/master' into cloth