-now sorts angle vectors on initiation
-made certain functions/members private
-can now represent the full 360° of azimuth angle
-GetNeighboringRays() now returns all phi angles if given ray points towards pole

CEquiangularRayDistribution
-added class (derived from RayGrid) for equiangular ray distribution

RayResolutionAdapter
-changes according to changes in RayGrid

Signed-off-by: Philipp Schäfer <philipp.schaefer@akustik.rwth-aachen.de>