Restored support for NIL as well as empty AttributeValues
be consistent with strftime time formatting
Response#attributes now returns Attributes collection instead of Hash.
This collection can be queried for both the default first value or
all values of the attribute.
Add support for ForceAuthn on AuthRequests
Fix DigestMethod lookup bug.
Documentation: the SAML spec states "the content type of the metadata instance MUST be application/samlmetadata+xml"
Metadata AuthnRequestsSigned and WantsAssertionsSigned + added MetadataTest
Merge pull request #138 from harrisony/master

Change logoutrequest.rb to UTC time
Merge pull request #80 from lawrencepit/metadata

SAML metadata changes
Merge pull request #135 from borgand/multivalue-with-nils

Restored support for NIL as well as empty AttributeValues
Make an explicit assertion.
Merge pull request #144 from newrelic/digest_method_lookup_bug_fix

Fix DigestMethod lookup bug.
Merge pull request #143 from phene/support-force-authn

Add support for ForceAuthn on AuthRequests
Fixed issues with hard and soft validation