adition of nSubJettiness and QJets code
minor change to accomodate fastjet-contrib namespace
minor bugfix
updated to new/fast Qjet version
changes requested by slava
switched to CMS random number engine
Merge pull request #2429 from jstupak/nSubJetti_qJets

RecoJets -- Addition of code for nSubjettiness and QJets
Merge branch 'CMSSW_7_1_X' of https://github.com/cms-sw/cmssw into CMSSW_7_1_X