Reformat the sspmod_saml_Message class, enhance phpdoc and prevent some possible bugs:
Reformat the sspmod_saml_Message class, enhance phpdoc and prevent some possible bugs:

- Variables possibly undefined when first used.
- Usage of XMLSecurityKey class without proper namespace.

ghalse/simplesamlphp,simplesamlphp/simplesamlphp,simplesamlphp/simplesamlphp,simplesamlphp/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,sitya/simplesamlphp,sitya/simplesamlphp,sitya/simplesamlphp,dnmvisser/simplesamlphp,dnmvisser/simplesamlphp,ghalse/simplesamlphp,simplesamlphp/simplesamlphp,sitya/simplesamlphp,dnmvisser/simplesamlphp,dnmvisser/simplesamlphp