MSVC: switch to boost::time instead of linux time, RootMinimizers now compiled as static, switch to MathFunctions::isnan in functional tests

Beam's alpha_i value can also be given as positive value now (internally it needs to be <=0 for incoming beams)

specific implementation RotationZ_3D.
Raw material for all other transforms temporarily moved to
UnusedTransform3D.h.
Status: Core compiles, FunctionalTests not yet.