New version of the plugin (not compatible with old one). Uses the new php-saml toolkit

Hi,

This new plugin is based on the opsway plugin but uses the new saml php-toolkit (https://github.com/onelogin/php-saml). As you can see, the plugin was almost rewrited.

Can I suggest to you to create a release tag with your current master brunch, create also a brunch named based-old-php-toolkit with the current code of your master,
and then apply my pull request with the changes to master and create a release tag with the new plugin?