- z depending variables are renamed using rather ght than z in there names
- WRF2IFF was restructured and comments have been added/cleaned up for better readability
- calc_tk() was added to utils to calculate temperature from potential temperature (this was a bug in former code)
- bugs in unstaggering of staggered WRF variables have been fixed
- WRF2IFF now understands als wrfpost files
- interpol() can now also extrapolate values