Couple of corrections and more updates

[arango]

The detide variables were removed accidentally from varinfo.dat in revision 168. Many thanks to Bin Zhang for reporting this problem. I also corrected a parallel (MPI) logic in routine netcdf_inq_var. I also fixed a problem in checkvars.F in the model flag for values greater than 4. This bug was introduced in revision 190 when the profiling was limited to model values 1 to 4 (iNLM, iTLM, iRPM, and iADM), as it should be.

I also continue my slow transition to parallel IO. I cleaned get_state.F and checkvars.F. All the internal variables are now known by all processors.