New hgc clusters electrons

[lgray]

@vandreev11 @pfs @salerno

Branch including PU robust E/gamma clustering and Roberto Salerno's GSF electron adaptations for HGC.

Should be usable for physics studies involving photons and electrons in high pileup.

Hadron clustering to come in another PR.

@bachtis

[cmsbuild]

A new Pull Request was created by @lgray (Lindsey Gray) for CMSSW_6_2_X_SLHC.

New hgc clusters electrons

It involves the following packages:

DataFormats/ParticleFlowReco
Geometry/HGCalCommonData
RecoEgamma/EgammaElectronAlgos
RecoEgamma/EgammaElectronProducers
RecoEgamma/EgammaIsolationAlgos
RecoParticleFlow/PFClusterProducer
SLHCUpgradeSimulations/Configuration

@civanch, @nclopezo, @ianna, @mdhildreth, @cmsbuild, @Dr15Jones, @StoyanStoynev, @slava77, @ktf can you please review it and eventually sign? Thanks.
@ghellwig, @mmarionncern, @Sam-Harper, @bachtis this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@fratnikov, @mark-grimes you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[lgray]

@mark-grimes @fratnikov This will require one addition commit that implements the clustering-specific calibration from @pfs.

[vandreev11]

@pfs @lgray @salerno @bachtis The agreement is to cut the CMSSW release with this on Thursday.
Pedro, is it fine for calibration to be ready by then? Thanks

[pfs]

@vandreev11 @lgray @salerno @bachtis Yes. Today I'm off during the day due to a course. I'll be able to complete calibration tonight as I have the samples already.

[mark-grimes]

merge