[tei-council] GitHub Repo import

Finally finished and available at https://github.com/TEIC/Guidelines Took about a week to run, with one interruption over the weekend due to some network glitch. Given the degree of pain involved, if we think this looks good, I think we should run with it. So let's: a) stop committing to SF (at least for now, maybe forever). Maybe I should actually restrict commit access to it lest anyone not on this list push an update. b) Check the above repo over for warts/see if anything's missing. There are a couple of branches that are artifacts of the CVS -> SVN migration that weren't visible on Sourceforge. We can probably get rid of them, but I haven't yet. There's also an sf/trunk branch, which I think is just a copy of master. Thoughts?