Historically
ncgen3 and ncgen
have treated 
uppercase atomic types
the same as lower case.
Change so upper case are no
longer allowed.

Also, synch oc.


git-svn-id: https://sub.unidata.ucar.edu/netcdf/trunk@3237 2e3060e4-1ed8-cf1f-9cc2-9586e844a556