[MRH] Updated Chemkin.java
[MRH] Updated Chemkin.java

Fixed bug in writing chem.inp file (that I introduced).  Forgot to put a whitespace between "S" and "END" in the ELEMENTS field.

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