Moved the calculation of pA and kex out off all loopes.
This was done by having two special 1/0 spin structure arrays.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-09
Parent: [r23759]
Child: [r23761]
