Current ivfhistos.cpp and ivfselections.cpp modules with 4 hists classes, no base classes
Possible to make Z-Rho and Rho plots for both Geant and Decay processes but a bit messy
 * event container now knows which data is outdated
 * ra stops if event's 'stop' boolean is set
 * improved plotting, esp. for ratio plots
 * moved some general-purpose utility functions for ptree handling from ra to base
add unfolding code and gitignore files
add zsvanalysis
Merge remote-tracking branch 'remotes/jochen/master'

Conflicts:
	ra/ra -> removed
Merge branch 'master' of https://github.com/dnowatsc/rootana