allowed visualization to support 'smart re-rendering'
removed version from pie chart meta
changelog
storing a few default gradients in themes
throtteling chart re-rendering
separated loadThemes and showThemeColors
updated chroma.js
added credits
fixed column.values()
more tests
updated chroma.js on cdn
update chart size
refined default gradients
updated chroma.js
allow hiding of base color selector
allowing visualizations to register asset callback functions
redirect chart asset to /static/
Merge branch 'develop' into feature/https-ready
https ready