Start migrating documentation out of LucidChart into Graphviz.
Start migrating documentation out of LucidChart into Graphviz.

Also a test to confirm that googlesource and github can handle
the markup.

Change-Id: If2fa5eb9a7d70cb84a44ecae689b7fd333a3b5c7
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/256796
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot