Added first version of MEASURE class for representing pdep jobs.
Added first version of MEASURE class for representing pdep jobs.

The MEASURE class encapsulates the data and methods needed for loading,
running, and saving pressure dependence calculations. This first commit
adds many attributes (not all of which are used yet) to the MEASURE class,
along with methods for loading and saving both input and output files.

nyee/RMG-Py,enochd/RMG-Py,nyee/RMG-Py,KEHANG/RMG-Py,pierrelb/RMG-Py,pierrelb/RMG-Py,nickvandewiele/RMG-Py,KEHANG/RMG-Py,comocheng/RMG-Py,comocheng/RMG-Py,nickvandewiele/RMG-Py,chatelak/RMG-Py,enochd/RMG-Py,faribas/RMG-Py,chatelak/RMG-Py,faribas/RMG-Py