Porting to git unreleased EGamma changes.

Porting the following tagset which was committed in CVS but not published. 

RecoEgamma/EgammaElectronAlgos V02-00-00
DataFormats/EgammaCandidates v08-00-00
Validation/RecoEgamma V08-00-03
RecoEgamma/EgammaElectronProducers V01-42-00
RecoParticleFlow/PFProducer V17-01-09 

In addition, 
CommonTools/ParticleFlow/python/EITopPAG_cff.py 
has been changed to match the changes.