Update README.rst

Slightly better handling of outstanding_certs.

Allow setting namespace prefixes.

Releasing new version.

Merge pull request IdentityPython#140 from rhoerbe/upstream-merge-201…

…40922

moved new class HttpParameters from samlp to httputil

Deal with no subject_confirmation element present.

Changed version to 2.0.0, needed by pysaml2 dependent projects.

Release 1.0.3

Release 0.4.3

Release 1.0.1

Release version 1.0.0