Changed BEANmaker.cc to permit usage of event file with negative event weight, e.g. stemming from aMC@NLO, Code was provided by Hannes Mildner. Code was put into an extra branch, until he is merged into the main branch
Corrected dependency in BEANmaker.cc
Merge pull request #1 from mharrend/negativweights

Changed BEANmaker.cc to permit usage of event file with negative event weight