Improved frame rate; added Hapke reflection model; added ellipsoidal …

…shapes

ABRAM1.3 Added occlusions; improved direct gridding efficiency; added…

… smart-calling of methods

ABRAM1.2 New object-oriented architecture; new fast mode with constan…

…t BRDF and no loops; increased fps at close range by pre-computing fov intersection; capability to merge QE and T spectra defined at different wavelengths

ABRAM1.1 Added parallelization

ABRAM1.0 Ready for dissemination