Initial commit

Merged subdetector variables in reco::GsfElectron::PixelMatchVariables
subdetectors = 10*subDet1 + subDet2
Set default pixel match variables

Set default values for pixel match variables to 0.
Removed spam error messages and replaced them with counters for debug
purposes.
Removed unnecessary error messages
Added pixel match variables
Updated member declarations

Moved unsigned char after floats in declaration and constructor.
Added comments, add consts
Added PixelMatchVariables to classes.h
Moved PixelMatchVariables in classes.h
Merge pull request #6242 from aidansean/NewPixelMatchCode

Saving pixel match info in the electron for offline ID purposes