Initial import of MATLAB materials.

The MathWorks have kindly given us some lesson materials for MATLAB under a CC-BY license --- many thanks to Jos Martin, Ken Deeley, and others for making that happen.  I have created a pull request containing everything, but before anyone starts work on integrating it, I'd like to ask:

1. Should we include MATLAB at all? On the plus side, there's a lot of demand; on the minus side, it's yet another language to support, and it's not open source.  (That said, I *am* typing this on a Mac, and we *do* have lessons on Excel...)

2. Should we use this as our starting point, or translate our existing novice Python lesson into MATLAB?  The R folks are taking the latter approach: Sarah Supp did an initial conversion for the recent NYU bootcamp, and a group coordinated by John Blischak is now making that "native R" (see http://lists.software-carpentry.org/pipermail/r-discuss_lists.software-carpentry.org/ for discussion, and https://github.com/swcarpentry/bc/pull/396 for work in progress).

So as not to drown this list, please add your thoughts to the PR; I'll summarize some time next week, and we'll figure out what to do from there.