renamed documentation to readme so that it shows up on github
exportroot.py: small fix
plotmpl.py: print file after plotting
start cleaning things up
1d histograms are working, drastically reduced content of mplhisto as they should only be used for plotting
1d bar plots working again
more changes to TGraph
2d plots working again
added docstrings
add z lims to 2d plots and clean up
Merge branch 'mplcleanup' of github.com:artus-analysis/HarryPlotter into mplcleanup

Conflicts:
	Plotting/python/plotmpl.py