ParticleComposition

1. OutputData.h
2. MathFuctions.h

1. ScalarRTCoefficients
2. SpecularMatrix (not sure. need to check)
3. MatrixRTCoefficients
4. Beam (revise existing BeamTest)
5. ScalarSpecularInfoMap
6. MatrixSpecularInfoMap

Bugfix in OutputDataIterator to have masked areas in multi threaded environment, corresponding unit test.

1. HomogeneousMaterial test
2. HomogeneousMagneticMaterial test

1. TRange
2. AxisBin

different implementation of getVolume() in FormFactorBox and FormFactorParallelepiped in order to be consistent with the other form factors
explicit addition of the special case q=0 in FormFactorSphere and FormFactorPyramid