Merge pull request #3 from asilx/master

Merging for one last time. I will push to original fork from now on
added wrapper classes for common data types that can read themselves from a DB object
switched tf reading to new wrapper classes. 5-10 times faster by avoiding double JSON parsing
added interface for reading logged designator values from KnowRob
removed outdated references to jackson json parser
transfer owl file of cram classes from mod_execution_trace to knowrob_cram