Implemented runtime conditionals for numpy backend#2

Merged

gronerl merged 3 commits intoGridTools:masterfrom

gronerl:runtime_if

Dec 10, 2019

Commits on Dec 3, 2019

Implemented runtime conditionals for numpy backend
Linus Groner
committed

Commits on Dec 6, 2019

Renaming and Code reuse for ternary
Linus Groner
committed

Commits on Dec 9, 2019

numpy runtime ifs: else case implemented by switching branches in ternary
Linus Groner
committed