improved call context implementation

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1608708 13f79535-47bb-0310-9956-ffa450edef68
checks for CMIS version in CallContext

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1609656 13f79535-47bb-0310-9956-ffa450edef68
Workbench: workaround for Swing bug 

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1609657 13f79535-47bb-0310-9956-ffa450edef68
CMIS-816 + CMIS-818: OpenCMIS server: allow service and wrapper implementations to return custom responses

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1609721 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into trunk