See the ttH twiki for instructions to set up your CMSSW area.
See the DIL twiki for more information about how to use some of these scripts.
To use this package, perform the following steps:
cd $CMSSW_BASE/src
git clone https://github.com/cms-ttH/ttHMultileptonAnalysis.git
cd ttHMultileptonAnalysis
scram b -j32