rm old contexts and systems, tune saturn

hunks/adhoc/saturn.js

hunks/interface/threejs_ghost.js

libs/smallvectors.js

save/contexts/cuttlefish/0ghost.json

save/contexts/cuttlefish/dbg-25ms-bare.json

save/contexts/cuttlefish/dbg-25ms-ghost.json

save/contexts/cuttlefish/dbg-50ms-bare.json

save/contexts/cuttlefish/dbg-50ms-log.json

save/contexts/cuttlefish/dbg-50ms.json

save/contexts/cuttlefish/dbg-l0.json

save/contexts/cuttlefish/dbg.json

save/contexts/cuttlefish/ghost-1000ms.json

save/contexts/cuttlefish/ghost-100ms.json

save/contexts/cuttlefish/ghost-50ms.json

save/contexts/cuttlefish/ghost-slow.json

save/contexts/cuttlefish/ghost.json

save/contexts/cuttlefish/imageTest2.json

save/contexts/cuttlefish/imagedev-display.json

save/contexts/cuttlefish/imagedev-thresholds.json

save/contexts/cuttlefish/mdmsegtest.json