fixed reading of the 'end time' of an object detection, now using the 'previousDetectionOfObject' property that links subsequent detections of the same object
Update srdl2.pl

A query like:

 cap_available_on_robot('http://ias.cs.tum.edu/kb/srdl2-cap.owl#GraspingCapability', R).

currently causes a failure because the call "rdfs_individual_of(Robot, RobotClass)" fails with a "not initialized" Exception if no robot is provided in the query. switching the order of the calls solves the problem for me
Merge pull request #12 from bbrieber/master

Update srdl2.pl to allow queries for robots with capabilities
added object recognition ability and software models to the srdl model of PR2
Merge remote-tracking branch 'knowrob/master'