not working yet
fixed issue with restricted canvas
dragging works
correct viewport calculation
minor clean-ups
dragging the viewport around
nice way to print timings
max height started (scrolling does not work correctly -- the height has to be set beforehand)
fixed overview interaction when smaller than screen width
temporary bounding box hack...
added playground
adding play groups
centering groups
subtle colors
fade out shape borders
better layout
nicer color transition
put logic into paint util
use shift to move pods
caching for renderpods and fixed position error for caches