added (still non-converted) code for diagram and marker visualization to knowrob_vis
added eclipe plugin to build.gradle in order to auto-generate project files
fixed deployment paths for java artifacts
moved and converted knowrob_mongo
added .gradle folders that seem to be important
converted tfjava and tf_prolog packages
updated knowrob_vis and made it compile
some gradle stuff updated. shall these folders really be in the repo? seems that they mostly contain auto-generated stuff