Fixes needed for cheapValueSnapshots in utils.cc for workspaces with RooCategories
Merge pull request #52 from nucleosynthesis/nckw-utils-cheapsnapshot-fix-for-roocategories

 cheapValueSnapshots and RooCategories
More sensible titles in plots
Merge pull request #53 from adavidzh/name_and_title

More sensible titles in plots