enable timestamps as double values (i.e. sub-second resolution)
belief_at does not assert location matrices in order to get rid of rdf_transaction
Merge branch 'master' of https://github.com/knowrob/knowrob_addons
minor fix in doc string
added avg_task_duration predicate, added dependency on comp_temporal for time computations
predicates that are used for checking whether the object is seen or blocked by the camera updated