Histograms modifications and enhancement

Here are the small modifications in the file ElectronMcSignalValidator.cc porting on histos presentations (missing legends).
new publish script instead of the three existing which are deleted.
README updated for use of scripts

DQMOffline/EGamma
/interface/ElectronDqmAnalyzerBase.h and src/ElectronDqmAnalyzerBase.cc have beed modified to take into account the setEfficiencyTag into BookH1andDivide histos. same changes have been introduced into Validation/RecoEgamma/plugins/ElectronMcFakePostValidator.cc and Validation/RecoEgamma/plugins/ElectronMcSignalPostValidator.cc

Validation/RecoEgamma/test
few modifications have been made into scripts analyze_gedGsfE.tcsh, finalize_gedGsfE.tcsh, store_gedGsfE.tcsh, and a new one was added (publish_gedGesfE.tcsh). 
The file ElectronCompare.cc was modified to take into account the releases wich are compared and the stats legend was moved on the right of the pictures (same moficiations are made with DQMOffline/EGamma/scripts/electronCompare.pyà
a modification was made into txt files for web histos presentation (ElectronMcFakeHistos.txt, ElectronMcSignalHistos.txt).