fix instashare
bugfix: deferred results which throw now show up as errors
remove bad exception line
force rmarkdown color to match background
add special comment to javascript that makes it debuggable
reasonable default for radius of bubble chart
allow constants as accessors
wdcplot arguments are optional
artifacts

Conflicts:
	htdocs/lib/dependencies_bundle.min.js
don't float markdown after a dcplot

use overflow:auto on the parent div so that text after the plots doesn't
get wrapped onto it.
better defaults for bubble charts

more scatterplot-like (until dc.js introduces scatterplots)
no labels
use one color only
..key.. and ..value.. special variables
artifacts
send help always to same window