tidying up legacy scripts
updated rootpy
cleaned the legacy scripts
General cleaning:
 - synchronised formatting
 - removed warnings & errors
 - simplified gROOT.SetBatch
added instructions for contributions (only naming for now)
added parameters to set_root_default
more tidying up
added electron and muon efficiency systematics to latex labels
Merge pull request #81 from kreczko/spring_cleaning

Spring cleaning