Added function hashCode() and equals() so that pdepwell does not have multiple copies of the same path reactions in its paths hashset.
Added function hashCode() and equals() so that pdepwell does not have multiple copies of the same path reactions in its paths hashset.

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