update iCMS requests to use correct WS-Trust namespace URI

- the original API published by RealMe had an erroneous trailing slash on
  the WS-Trust namespace URI
- the version 1.1 API corrects the namespace URI and has an updated WSDL
  file pointing to the new end-points
v1.11

    - first release to CPAN with assertion service and iCMS support
    - implement cryptographically random ID tokens
    - add verification of IdP SSL cert on back-channel + option to skip