working HybridGBRForest based file storage
add back GsfElectron version of correction function
fix typo/numerical offset for EE corrections
add phi-folded V5 version of the regression which may be more robust to bias from MC intercalibration constants
fixed compilation for ECALELF
plugin name changed consistenty with the path name
Merge pull request #2 from shervin86/shervinForECALELF

Plugin name changed according to package path
avoid using centrally managed RooConstVars (might fix mysterious crashes?)
add implementation for V4 with traditional training method
Merge pull request #3 from bendavid/treebased

Treebased