First volley back from RENCI.

Bill, just getting started. Filled in the text bubbles with text we can talk about. Put in an image Brian suggested but I think it can be replaced with something that more graphically illustrates a ugrid. Made some RENCI attribution changes. Brian says we need to credit the NSF Earth Cube project which is paying for me to come help with this poster and the NOAA JHT Testbed project which has supported pyugrid. I have cites for those from Brian and will add tomorrow to the bottom matter. I think we also need to break out the QR code cites and duplicate them in the bottom matter as well. Chugging along.