Added Matthew McCullough's git-plotrepo
Added Matthew McCullough's git-plotrepo

Original source: https://github.com/matthewmccullough/scripts/blob/master/git-plotrepo.rb

unixorn/git-extra-commands,unixorn/git-extra-commands,unixorn/git-extra-commands,unixorn/git-extra-commands,illegalplater1/Script-Collection,illegalplater1/Script-Collection,illegalplater1/Script-Collection,illegalplater1/Script-Collection