Add mesonet data type
Add netCDF sounding type
Add qcf data type
Add aeri data type
Add more ihop datasets and update .ten format
Update CMakeLists
Preliminary support for XYP mode
Working XYP output

Note that this is not actually a separate mode, but rather a
different output format. The analysis is still conducted in an
XYZ space, but interpolated via the splines to pressure levels
upon completion.
Add surface pressure to XYP
Add even lat/lon output option
Fix thermo derivatives in XYZ and RTZ