text/html output
text/html output
initial support for gruff
added HTML wordcloud
Google Maps heatmaps
stacked bar graphs
remove codecell override
set highlight mode to ruby in custom.js
add kernel_info and status messages
change profile creation

- remove `iruby_` prefix
- default profile is just `ruby`
- add config to ipython_config.py so it affects all front ends (console, qtconsole, notebook)
remove Python-style __call__
update how kernel starts
update gem spec and README
start takes no argument
return nil on flush
fix displayhook invocation

nothing to display for nil result
added radius to Gmaps.heatmap
tests and fixes for gmaps
bumped version
icon_url