Support for http://docs.oasis-open.org/security/saml/Post2.0/sstc-request-initiation-cd-01.html in the metadata.
Merge branch 'master' of https://github.com/rhoerbe/pysaml2 into rhoerbe-master

Conflicts:
	doc/examples/idp.rst
	example/idp2/idp.py
	src/saml2/attributemaps/saml_uri.py
	src/saml2/sigver.py
Don't try to check the signature if there is no one there :-/
Merge pull request #119 from dv10den/master

Updated documentation
Made sure requested/Optional attributes gets expressed in metadata.
Minor style adjustment
Merge branch 'master' of github.com:rohe/pysaml2
Refactored and improved attribute consumer service metadata construction.
Fixed problematic logic.
Submit button added to POST form

Added Submit button to generated POST form to allow manual submit
in case user has JS disabled
Merge pull request #120 from tpazderka/submit_button

Submit button added to POST form
Allow urls instead of file paths for cert_file, ca_certs and key_file configuration parameters.
Removed unused import
cert_file, key_file and ca_certs should point to a file with the certificate not the certificate itself.
Fixed attribute filtering logic, take 2.
Fixed decryption/verification of signed and encrypted assertions.