spray version updated to 1.3.1,  akka version updated to 2.3.0

1) In order to run pre-canned against spray 1.3.1 / akka 2.3.x  I had to rebuild it against these version. Otherwise can actor "IO-HTTP"  could not be created. No other changes in pre-canned sources were required.
2) support for request HttpEntity content in Expectations