Merge branch 'WJetsCleanup' into 'master'
W jets cleanup
A large number of Rank 1 tensors have been culled from existence.
Also removed many jio calls from functions where a quark/antiquark is the distinguishing factor.
Unlikely to be an increase in performance due to this removal of lines of code, but it should be more readable.
See merge request hej/HEJ!62