Add helper function to do the CMS Preliminary blurb
Improve docstring
Un-break the cms label test
Preserve current canvs + don't let objects get GC-ed
Return in sensible order, respect with: indentation
Retrieve global pad correctly
Merge pull request #241 from ekfriis/cmslabel

Function to add "CMS (Preliminary|Simulation) 20\d\d" and sqrt(s) blurbs to a plot