answered the css repo + shepherd Q's and added a couple more that have come up recently

@plinss - can you review my responses to the CSS repo and the Shepherd questions and make sure I'm answering them satisfactorily?

@tobie - the "who else..." question could be merged with "which browser vendors..." more generally as "who runs these tests?" - we've had this asked at multiple TestTWF events. You ok with that?

The one I added about updating tests when specs change came up from my recent CSS 2.1 errata exercise. I honestly don't know the answer and will poll the CSS WG on how it's been done in the past (@plinss - if you have any input here as well, greatly appreciated). I'd also like to poll other WGs and compile the responses here. I'll take that to the mail lists.

Last, the one I added about running automated reftests - we've been asked that one at TestTWF events as well. I'm hoping for you or @automatedtester to maybe fill in the blank here with WebDriver info (I'm kinda curious where we're at with that anyway :) )