begin histfactory wrappers
add generic fitting function
add histfactory subclasses
add RooStats to quickroot and use QROOT in histfactory
add first histfactory test and generate required dictionaries
subclass NormFactor
include NormFactor in histfactory test
more getters and setters for HistoSys
specify low and high in HistoSys __init__ and include utils in histfactory namespace
AddNormFactor: be flexible on args
add pythonized HistFactory::Channel
more setters and getters in Sample and Data
more setters and getters for Channel
subclass HistFactory::Measurement
add RooWorkspace subclass
docstrings
support summing Channels
preserve staterrorconfig when summing Channels
simple refactor
allow specification of histogram name in ravel()