add "exportable" plugin for exporting as an image
concatenate "exportable" plugin in Gruntfile.js explicitly
convert HTML legend to SVG
include styles for SVG legend
correct typo in LESS variable name
correct unclosed DIV in bar-stacked example
fix automatic download of exported image on Firefox
change default export filename to include ".png" extension
rename base64 data url encode function
rename callback
change indentation of switch-case
use object URLs, since IE9-11 enforce a limit on URL length
fix canvas fill dimensions
correctly pass in options to getSvgDataUrl()
revert change to use object URLs
check for download attribute on <a>
change comment on shims
remove the revokeUrl callback
fix accidentally renamed property
convert data url to blob, then to an object url, and use navigator.msSaveOrOpenBlob() in IE