BUG FIX: Ea must have units of cal/mol in PLOG format (for CHEMKIN)
BUG FIX: Ea must have units of cal/mol in PLOG format (for CHEMKIN)

(1) According to the Chemkin-v4.1.1 Input manual, the activation energy (Ea) in
a PLOG line must have units of cal/mol.  Before this commit, we were
reporting the Ea in units of kcal/mol.

NOTE: MRH does not know what Cantera or others (OCP?) assume in their
PLOG formatting.

(2) Added method getPressure(int), to be used in reading PLOG format from
kinetics_libraries

ReactionMechanismGenerator/RMG-Java,rwest/RMG-Java,KEHANG/RMG-Java,connie/RMG-Java,connie/RMG-Java,rwest/RMG-Java,rwest/RMG-Java,keceli/RMG-Java,nyee/RMG-Java,faribas/RMG-Java,KEHANG/RMG-Java,connie/RMG-Java,nyee/RMG-Java,nyee/RMG-Java,ReactionMechanismGenerator/RMG-Java,enochd/RMG-Java,enochd/RMG-Java,enochd/RMG-Java,KEHANG/RMG-Java,connie/RMG-Java,rwest/RMG-Java,jwallen/RMG-Java,keceli/RMG-Java,ReactionMechanismGenerator/RMG-Java,enochd/RMG-Java,keceli/RMG-Java,jwallen/RMG-Java,enochd/RMG-Java,enochd/RMG-Java,ReactionMechanismGenerator/RMG-Java,faribas/RMG-Java,KEHANG/RMG-Java,nyee/RMG-Java,KEHANG/RMG-Java,keceli/RMG-Java,jwallen/RMG-Java,ReactionMechanismGenerator/RMG-Java,keceli/RMG-Java,jwallen/RMG-Java,rwest/RMG-Java,jwallen/RMG-Java,nyee/RMG-Java,jwallen/RMG-Java,faribas/RMG-Java,faribas/RMG-Java,keceli/RMG-Java,nyee/RMG-Java,connie/RMG-Java,KEHANG/RMG-Java