v3.2.0

Sylvester Joosten

@sly2j

de9d262d · Merge branch 'v3.2-dev' into 'master' · Jun 07, 2020

v3.2.0 release:
* Add fermi momentum
* Add HepMC3 support
* misc bugfixes
* add crude J/psi off He-4 model