Easily create fallback images for interactive graphics

[alykat]

Maybe something like:
https://github.com/kevinschaul/depict
(recommended by Tyler)

Won't need it for everything in the dailygraphics rig — probably just the D3 things.

[TylerFisher]

I think depict pretty well covers what we want to do. It would just add some more stuff you have to install when you get the repo going (phantomjs through homebrew and depict through npm). I'm not aware of anything Python-based that would also do this so we could just add to requirements.

Basically, this will require a headless browser, and phantomjs is the standard there. I think installing depict and adding that to the render function is the best course of action.

[onyxfish]

Thought this might be a quick thing to implement, but sadly...

[truncated]

/Users/onyxfish/.node-gyp/0.12.0/deps/v8/include/v8.h:816:13: note: declared protected
      here
  V8_INLINE HandleScope() {}
            ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

[onyxfish]

Note for posterity: Had the bright idea to try html2canvas from the parent. It doesn't work. iFrames don't render at all and apparently there are also issues with SVG rendering.

[onyxfish]

Mostly working on branch preview. Remaining issues:

• WebFonts aren't loading.
• Logo needs composited in.

[onyxfish]

WebFonts are now working with slimer, but the slimer install process is a bit of a mess. :/