added systematics studies
added ZJet bins to syst database
selected rows to be used in systematic database
Modified name in QGSyst
added test/provasyst.cpp
QGSyst.cc added
added a sample Syst program in test, and a Makefile. cleaned up QGSyst in interface and src
moved isInside function to the cc
provaSyst.cpp and Makefile work now
SystSmearing.cc not used anymore, now all in QGSyst