Recent caf_eff_utils modifications

• p21-br-19 May 20, 2010:
  New version of EM corrections for simultaniouse processing of different data epochs.
• p21-br-17 February 19, 2010:
  TauCorr: events in over/under flow bins were rejected by the selector. They are now kept.
• p21-br-16 December 13, 2009:
  MuonCorr modifs: luminosity dependent reweighting
  
  
• p21-br-15 November 18, 2009:
  EMCorr modifs:
  - enable separate settings for CC and EC
  - scale factor uncertainties put into event
  - maximum # of EM objects to consider from the input branch
  
  
• p21-br-14 June 4, 2009: add ignore over/under flow bins options to JetCorr. Add variable sign(PV_Z) x eta to jet correction (need this for tagability sdcale factors)
• p21-br-13 June 4, 2009: modified EMCorr and EMEffTool to work with 3D .spc files (lumi+2D)
• p21-br-12 May 19, 2009: update jetid to use signed PVz*jetdeta
• p21-br-11 February 11, 2009: add TauEffTool and handle TauNN corrections in TauCorr
• p21-br-10 December 3, 2008: add TauCorr TrkEffTool to correct tau trk efficiency (tau trk is based on muon trk id)
• p21-br-09 September 30, 2008: EMCorr correction for 0 ICR electrons
• p21-br-08 June 20, 2008: New muon efficiency parameterization including dRjet (from Zhenyu).
• p21-br-07 June 9, 2008: added ICREffTool and ICRCorr
• p18-br-10, p21-br-06 Apr 22, 2008: Added 2 flags to EMCorr and MuonCorr: ApplyToGlobalWeight and NoObjectProtection, to apply the correction factors to the global weight and to protect against no objects to correct for. Both are set "true" as default.
• p18-br-09, p21-br-05 Sep 25, 2007: Add possibility to apply normalisation to the correction factor in EMCorr
• p18-br-08 Sep 17, 2007: Add lumi, dR(em,jet) variables to EMCorr
• p18-br-07, p21-br-04 July 4, 2007: Remove obsolete xml code from test file
• p18-br-06 : JetCorr: correct behavior when no onject found in the input jet branch
• p18-br-05 : MuoCorr: under-/overflow flags need to be set for MC efficiency as well. also, do not abort event weight calculation if MC efficiency is 0
• p18-br-04 : Protection for no input objects error.
• p18-br-03 : Add proceessors for the jet corrections. JetEffTools to use |deta| that was used in parametrizing certified jet efficiencies. Otherwise a large number of exceptions will occur. Update from Amnon: return jets' ActAs state back to input state at the end of the JetCorr call.
• v01-09-01 : Options to ignore the overflow and underflow and substitute them with the border bin value