Automatically try various decompression algorithms on input files
Merge pull request #90 from pwaller/compressed-input

Automatically try various decompression algorithms on input files
Fix parsing of arguments if mcviz is used as a module
Color should always be an int
Merge pull request #92 from schmitts/PdfInfo

read PdfInfo from HepMC ascii file
Merge pull request #91 from schmitts/exact_cut

cut on exact value, useful for e.g. cutting on pdgid
cut on mothers' and daughters' parameters