New example to import ascii data

Examples/python/fitting/README

...tting/ex01_SampleParametersIntro/SampleParametersIntro.py

.../fitting/ex02_FitCylindersAndPrisms/FitCylindersPrisms.py

...ex02_FitCylindersAndPrisms/FitCylindersPrisms_detailed.py

...02_FitCylindersAndPrisms/refdata_fitcylinderprisms.int.gz

...ing/ex03_FitSpheresInHexLattice/FitSpheresInHexLattice.py

..._FitSpheresInHexLattice/FitSpheresInHexLattice_builder.py

.../python/fitting/ex04_FitScaleAndShift/FitScaleAndShift.py

Examples/python/fitting/ex05_FitWithMasks/FitWithMasks.py

.../fitting/ex06_FitStrategies/FitStrategyAdjustMinimizer.py

...les/python/fitting/ex07_ImportUserData/ImportMariaData.py

...les/python/fitting/ex07_ImportUserData/maria_geometry.png

...ples/python/fitting/ex07_ImportUserData/maria_raw_data.gz