v3.0.0

• Add support for the “Metadata Profile for Algorithm Support” extension.
• Getters for NameIDs will now return an object of type \SAML2\XML\saml\NameID.
• SAML2\Utils::addNameId() and SAML2\Utils::parseNameId() are marked as deprecated.
• Dependency on xmlseclibs is upgraded to ^2.0|3.0 to remove transitive dependency on mcrypt.
• Add dependency on ext-zlib in composer, which is (and has always been) needed for HTTPRedirect-binding.
• Various bugfixes.
• Improved testsuite.