set default zoomFactor to 0.8 (thus compact view)
display cursor pos in world_status, object tooltip
focussing submit button in dropdown-only dialogs

after change of the last dropdown
change gate arithmetics

according to 2003 paper
Initial gate arithmetic tests.
Initial node net basic logic tests
Testing sensors and actors
Initial pipe tests
Minor, avoid exception when gatefunctions field unset.
Adding por/ret searchability
Merge remote-tracking branch 'upstream/master' into psi-mouse