Summary:
I moved the source of the sphinx project to newdoc for newdoc/dev.
I updated the sphinx config for markdown to something that works for recent
versions.
PNG images rendered better than SVG for me.
I moved the TARGETS to newdoc.
Reviewed By: quark-zju
Differential Revision: D26801426
fbshipit-source-id: 3ae51e886d27f848f0f6a48c96056da607d8da45
