The cross sections for pi N --> pi K Y

We implemented the low energy cross sections for

\[ $\pi N \to \pi K \Lambda$\quad,\qquad $\pi N \to \pi K \Sigma$ \]

in revision r2636 according to Kai Gallmeister's fits​ to experimental data.

(The cross section pi N --> K Y was already correctly included. Due to the High Energy threshold we do not have to implement a cross section for pi N --> pi pi K Y.)

Notes:

• You find the implementation of the above fits in the module parametrizationBarMes.f90.