Simplified auto-generated scripts from ExportToPython; prepared first Python Example for coverage by new functional test.

Resolving #1440: CMake part done. C++ part half done. Still TODO: (C++) compare with reference (Py) modify all examples

CMake configuration basically ready for Examples persistence tests; unit tests temporarily disabled.

PyCoreTest now writes concise log lines, and by some miracle Python errors also appear in the log. This resolves #1571, except for a possible failure to detect zero-filled detector images.

Python script, generated by ExportToPython, now takes argument '-p' for plotting, or <output_filename>. This resolves #1573.

Merge IFunctionalTest::analyzeResults() into IFunctionalTest::runTest() [Tests are a sequence of actions, each of which may result in failure. Therefore there is no natural division between test and analysis]. Also detect errors from Python script execution commands. This partly resolves #1571.

Removed unused members from FormFactorInfo. This resolves #1556. Also moved implementation into separate file.

more explicit method name "simulationToPython"; change parameter name into "simulation_output_filename" to make clear this is the output filename of the simulation, not the output filename of the export method.

register _all_ 4 or 5 parameters of the 2D FT-Distributions, and allow them as constructor arguments.

unified short name for different local pointers, to bring forward code duplications that shall be simplified later.

Merge branch 'parunit' into develop. Parameters now have a unit; FormFactor argument lists for Phyton export are generated automatically. This is a big step towards resolving #1428.

# Conflicts:
#	Core/Instrument/DetectorMask.cpp
#	Core/Samples/BAVersion.h
#	Fit/Minimizer/MinimizerFactory.cpp
#	Fit/Minimizer/TrivialMinimizer.cpp
#	Wrap/swig/libBornAgainFit.i
#	auto/Wrap/libBornAgainCore.py
#	auto/Wrap/libBornAgainCore_wrap.cpp
#	auto/Wrap/libBornAgainFit_wrap.cpp