Code for Drell-Yan analysis

• Tested with CMSSW_5_3_9_patch3 and BAMBU version Mit_031 (and Mit_029c for MitPhysics)
• Place the code in the $CMSSW_BASE$/src area
• The MitPhysics package needs to be patched:

cd $CMSSW_BASE/src/EWKAna/Ntupler/patch
./patch_setup.sh