fixed an invlaid sequence for ldapgvat
added support for more hash algorithms (SHA2, RIPEMED160)
(this patch required for saml2test alg config option)
SIG_RSA_RIPEMD160 not implemented
undo removeal of imports of xmldsig.SIG_RSA_SHA..
added support for md5 as digest algorithm (used to test that this is rejected);
added support for redirect signature algorithm check
extended API with lists for supported NameID formats, AttributeName formats, digest and sig algs
addition in samlp rejected by upstream, hence class moved to httputil
Merge https://github.com/rohe/pysaml2

Conflicts:
	src/saml2/attributemaps/saml_uri.py
Merge pull request #140 from rhoerbe/upstream-merge-20140922

moved new class HttpParameters from samlp to httputil