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
Updating running scripts, correcting some file paths, fixing naming of merged histogram files.
Correcting and updating the 98_fit_cross_checks.py script in line with the recent changes in DPS.
added line to setup_standalone.sh to add bin directory to list of executables; removed .sh from overall measurement script.
Adding script to make tables and perform script checks for all variables together.
Fixing some more file paths according to recent naming changes.
Merge pull request #84 from jjacob/master

Some final updates to ensure all scripts work and all files are named correctly after recent changes.
Moved all the cross section config pieces into config.XSectionConfig
added experimental config that would allow for smarter things
added space between command and "&"
Cleaning up data/* and moving old unfolding.py to legacy
Some cleaning up
Added an exception for trying to unfold zero data, added unfolding unit tests