Missing themes from Chroma master

[robcresswell]

Hi! There are a few themes missing from https://xyproto.github.io/splash/docs/ that can be found in https://github.com/alecthomas/chroma/tree/master/styles; could that be updated? I can put up a PR too, if you're happy for me to.

[xyproto]

Thanks for the notification!

If there's a method for doing this automatically, with Travis CI or something similar, that would probably be the optimal solution, but until then, I'll be happy to upate it manually if notified.

[robcresswell]

That's a little beyond my knowledge I'm afraid, thankyou for updating though!