to render image file to be fit to the diagram size
expand clip size by box-shadow
add `gif` format
always image/png for GET
just left-indent
Merge branch 'master' into issues/18
shrink rows of textarea
improve try.html as available to get .png image
Merge branch 'master' into issues/18
app config in good shape
remove top-level error trap (looks not working)
error handling for exec jumly.sh
clustering (pre-fork)
Merge branch 'master' into issues/18