Fixed mkdist to latest with the current folders Fixes #1005

Included mathjax pull in htdocs for distribution tar ball
Renamed bootstrapR.sh We are bootstrapping RCloud not R. I have another script called bootstrapR to bootstrap "R"
moved 'gist' in rcloud.support from depends to suggests
Added github as depends in githubgist
Currently deleting gitgist and guitar only because boost is fairly difficult to build on target systems