Our two build systems can generate almost entirely a modulemap file laying out
one module per library. Due to some non-modular implementation in ROOT's core we
still need to treat some header files specially.

This patch appends modular header files to the modulemap while skipping the
predefined ones. Configure-make relates all headers that are installed in
$ROOTSYS/include to their library whereas relates only headers which are part of
library's dictionary.

- Make TVirtualMC::GetMC() inlined and the getters accessing data members non-virtual.

All files, which depend on the definition of TBuffer, should include TBuffer.h.

Fixes the modules build.

Document this backward incompatible change.

Reestablish method TPythia6::Pytune  (see https://root.cern.ch/phpBB3/viewtopic.php?f=3&t=20399&p=87881#p87881)

Conflicts:
	bindings/pyroot/src/MethodProxy.cxx
	cmake/modules/RootConfiguration.cmake
	etc/http/files/main.htm
	etc/http/files/single.htm
	geom/geompainter/src/TGeoChecker.cxx
	graf2d/mathtext/inc/mathtext.h
	graf2d/mathtext/src/fontembed.cxx
	graf2d/mathtext/src/fontembedps.cxx
	graf2d/qt/inc/TQtCanvasPainter.h
	gui/qtgsi/src/TQRootCanvas.cxx
	hist/hist/src/TBackCompFitter.cxx
	hist/hist/src/TEfficiency.cxx
	hist/hist/src/TFractionFitter.cxx
	hist/hist/src/TGraphAsymmErrors.cxx
	hist/hist/src/TH2.cxx
	hist/hist/src/TH3.cxx
	hist/hist/src/TMultiDimFit.cxx
	hist/hist/src/TProfile.cxx
	hist/hist/src/TProfile2D.cxx
	hist/hist/src/TUnfoldBinning.cxx
	html/src/TDocParser.cxx
	math/foam/src/TFoam.cxx
	math/genvector/inc/Math/VectorUtil_Cint.h
	math/minuit2/inc/Minuit2/FumiliMaximumLikelihoodFCN.h
	math/minuit2/inc/Minuit2/FumiliStandardChi2FCN.h
	math/minuit2/inc/Minuit2/FumiliStandardMaximumLikelihoodFCN.h
	math/minuit2/inc/Minuit2/StackAllocator.h
	math/minuit2/src/TChi2ExtendedFCN.cxx
	math/minuit2/src/TChi2FCN.cxx
	math/minuit2/src/TFitterMinuit.cxx
	math/minuit2/src/TFumiliFCN.cxx
	misc/table/src/TTableDescriptor.cxx
	net/auth/src/rsaaux.cxx
	test/QpRandomDriver.cxx
	test/ios/RootBrowser/Src/Browser/Controllers/FileCollectionViewController.mm
	test/ios/RootBrowser/Src/Browser/Controllers/FileContentViewController.mm
	test/ios/RootBrowser/Src/Browser/Controllers/ObjectViewController.mm
	test/ios/RootBrowser/Src/Browser/Views/PadView.mm
	test/ios/RootBrowser/Src/CustomUI/RangeSlider.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/AxisFontInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/AxisInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/AxisLabelsInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/AxisTitleInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/FilledAreaInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/H1BinsInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/H1ErrorsInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/H1Inspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/InspectorWithNavigation.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/LineInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/MarkerInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/ObjectInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/PadInspector.mm
	test/ios/RootBrowser/Src/ObjectInspector/Controllers/PadTicksGridInspector.mm
	test/ios/Tutorials/PadOptionsController.mm
	test/ios/Tutorials/PadView.mm
	test/periodic/NdbMF.cxx
	test/periodic/NdbMTReacDesc.cxx
	test/periodic/NdbMTReactionXS.cxx
	test/periodic/NdbParticleList.cxx
	test/periodic/XSGui.h
	test/stressLinear.cxx
	test/stressRooFit_tests.cxx
	test/tcollbm.cxx
	test/vmatrix.cxx
	tutorials/eve/boxset.C
	tutorials/geom/geodemo.C
	tutorials/graphs/splines.C
	tutorials/hist/th2polyEurope.C
	tutorials/mc/CompareMasses.C
	tutorials/memstat/memstat.C

Makefile sustem) and for AIX (not tested)

rootcling will write out ROOT files; that does not work for libCore and RIO
which instead use rootcling_tmp.
All other libraries use rootcling -rootbuild.
Rename ROOTCLINGTMP to ROOTCLINGSTAGE1; rootcling -rootbuild is ROOTCLINGSTAGE2.

(according to Geant4 tls.hh and G4Threading.hh)

By Thomas Ruf.

By Thomas Ruf.

now the library names in the rootmaps are sane.
In addition, the creation of the tmva and genvector dicts was
simplified.