import all the pdf stuff we need to keep this self-contained
suppress warnings
add some new core plotting code
bringing in small changes to RooMorphingPdf
fix for bbb warning, better output filename deducation when writing datacards
update CombineHarvester tests and plotting
move roofit pdf stuff to a separate package
adding documented example
add missing ignore file
Merge pull request #9 from ajgilbert/combine-tools-dev

Update CombineTools code, add new CombinePdfs package