Add more information about T.A. training

[k4y3ff]

I've been reading through the organizing wiki, and most pages that reference T.A. training just say this:

Set up a teacher training. This often happens during the week of the workshop. If you can't get a
separate evening, you can do it during the Installfest, but try to get extra volunteers if you do that. Don't want to leave the student high and dry while teachers discuss best practices.

Take a look at the teacher training slides, which live at
http://docs.railsbridge.org/workshop/more_teacher_training.

That RailsBridge presentation is great at what it does, which is explain how to act when T.A.ing classes that, in particular, serve diverse groups of people.

However, there are other logistical things that should probably be discussed at volunteer training, like deciding who's going to be checking people into the venue, making sure that all of the volunteers know where the women's and unisex bathrooms are, deciding on a "ringmistress," etc.

Some of these things are scattered around the wiki, but we should really have a page that just discusses T.A. training, specifically, to make these things clearer. I made a page here:

https://github.com/ClojureBridge/organizing/wiki/TA-Training

I'll add some stuff to it in a bit, but does anyone have specific suggestions for the T.A. training they'd like to add?

[bridgethillyer]

Whatever you can get in there now - even in a rough state - would be great. It's wayyyy easier to do when it's fresh from having just done a workshop.