Fixed the "jumpy" CCSNe rate to one continuous
Fixed the "jumpy" CCSNe rate to one continuous

This fix always adds a fraction of stars from a deterministic IMF bin
that would convert into CCSNe, even if the central mass would be lower
than the transitionmass limit.

NuGrid/NuPyCEE,NuGrid/NuPyCEE,NuGrid/NuPyCEE,NuGrid/NuPyCEE