RMG-py creates better measure input files.

It used to write
    isomer("HCCOH")
    reactants("C2H", "OH")
instead of 
    isomer("HCCOH(31)")
    reactants("C2H(3)", "OH(32)")

This closes #40

Author: rwest

rmgpy/measure/output.py

@@ -118,10 +118,10 @@ def writeNetworkConfigurations(f, network):
     """
     # Write isomer configurations
     for isomer in network.isomers:
-        f.write('isomer("{0}")\n\n'.format(isomer.label))
+        f.write('isomer("{0}")\n\n'.format(isomer))
     # Write reactant configurations
     for reactants in network.reactants:
-        f.write('reactants("{0}", "{1}")\n\n'.format(reactants[0].label, reactants[1].label))
+        f.write('reactants("{0}", "{1}")\n\n'.format(reactants[0], reactants[1]))
     # No need to write product configurations, as these are assumed
 
 ################################################################################