Pull in updates

The update included in this request are fairly small.  The biggest change is the inclusion of a second gsidiag_bin2txt directory, as older read_diag.f90 versions weren't directly replacable with the new (5.12+) versions.  Also, I added some info to some of the readmes, made the webpage more complete, and whatever else.  I think outside of some small config file changes, they are all in the subdirectories for the code I've written.

Let me know if there are any issues.
-Will