Added scripts to study trigger towers
Added SingleElectron and SinglePi fragments
Added SingleMu fragments for one single trigger tower
Drop unused branches

- genJets, genMET
- TTTracks
- TTClusters: iLayer, iRing, iSide, iPhi, iZ
Updated NTupleTools unit tests
Updated AMSimulation unit tests
Merge pull request #10 from jiafulow/prepare-v015-1

Upgraded to work in CMSSW_6_2_0_SLHC12_patch1