Paper: BCE: Berkeley's Common Scientific Compute Environment for Research and Education (Dav Clark)

Please accept this paper for now - it's in terrible shape, but I promise I'll clean it up. I just wanted to be sure to send a pull request for *something* in time for the deadline (and I'm teaching at an R bootcamp now... oops).
This is a little over-parenthesized.  The language should be clearer, particularly on sentence 1.