Merge pull request #34 from fredrikt/master

Make crypto backend configurable.
Metadata neede to make the filter work
Metadata needed to make the filter work.
Merge pull request #36 from HaToHo/master

Missing metadata in function call.
Use the correct attribute names.
Use the correct attribute names.
Merge branch 'master' of github.com:rohe/pysaml2

Conflicts:
	src/saml2/assertion.py
May not add content type if one exists in the header.
Merge pull request #37 from HaToHo/master

Content-Type problem
Made things work after the last merge.
Change to locations to one
Added another authn context
Added another authn context
Handling error in XML document
Updated tests
Removed unused url
Fixed wrongly spelled entity category
Added namespace tag definition.
Spelling error
application: Rewrite URL-processing for readability.