6.0.0 release of the SimpleSAMLphp casserver module.

This is the first release since this module became the official casserver module.

The release is mainly a maintenance release where the module has been updated to conform to simpleSAMLphp 1.14, as such the following changes have been made;

• Renamed module from sbcasserver to casserver.
• Added composer file to make module installable according to simplesamlphp guidelines.
• Replaced use of deprecated SimpleSAMLphp api's.

The release also contains the following minor bugfix;

• Fixed a bug when comparing service url parameter to ticket service url, which caused service urls with %20 encoded spaces to fail verification.