Added note about modified VF2 for reporting MCS.

Author: asad

README

@@ -9,8 +9,9 @@ Cordella, L.P.; Foggia, P.; Sansone, C.; Vento, M.
 Pattern Analysis and Machine Intelligence, IEEE Transactions on
 Volume 26, Issue 10, Oct. 2004 Page(s):1367 - 1372
 
-The original code was taken from http://metamolecular.com/mx and modified by
-Syed Asad Rahman ([email protected])
+The original code for VF2 substructure code was taken from http://metamolecular.com/mx and modified by
+Syed Asad Rahman ([email protected]). We have further modified VF2 for reporting MCS between two molecules.
+The extended version of the VF2 for reporting MCS is called VF2MCSPlus.
 
 This code requires the Chemistry Development Kit 
 (CDK http://cdk.git.sourceforge.net ) .