Add customauth module and idp-hosted changes

README.md

metadata/saml20-idp-hosted.php

modules/customauth/.gitignore

modules/customauth/README.md

modules/customauth/default-disable

modules/customauth/lib/Auth/Process/RedirectTest.php

modules/customauth/lib/Auth/Source/External.php

modules/customauth/lib/Auth/Source/StaticSource.php

modules/customauth/lib/Auth/Source/UserPass.php

modules/customauth/templates/authenticate.tpl.bak

modules/customauth/templates/authenticate.tpl.php

modules/customauth/templates/authenticate.twig

modules/customauth/www/assets/css/default.css

modules/customauth/www/assets/favicon.ico

modules/customauth/www/assets/script.js

modules/customauth/www/authpage.php

modules/customauth/www/redirecttest.php

modules/customauth/www/resume.php