Modifications of example 1 in section “Simulation” of BornAgain manual in order to match the script given in the Appendix

revised version of BornAgain manual and corrected version of FormFactorBox.cpp (implementation of radius and length)

Conflicts:
	App/src/TestMiscellaneous.cpp

Conflicts:
	Core/FormFactors/inc/FormFactorBox.h

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

User manual now can be compiled with cmake in standalone mode (without whole BornAgain), UserManual.tex.in is replaced with shorter version located in cmake/scripts

New Python unittest for testing IntensityData from CMake, all py examples/tests are adjusted for new getIntensityData()