Change displacedDensity to be relative displacement of one level.
Add potentialDensity for displacement to top level.
Incrementing version number to 1.2
Modify mpas_atmphys_constants.F to satisfy both older and newer versions of the pgf90
compiler concerning the inheritance of 'cp' through use statements.
Incrementing version number to 1.3
Fix shell script for getting atmosphere physics lookup tables:
'==' should be '-eq' for integer comparisons.
merging