New THStack drawing option `NOSTACKB`. histograms are drawn next to each other as bar charts.
Returns the canvas for the doc.
Do not write in /tmp during tutorials execution
Provide a new ClassDefOverride adding "override" to all virtual functions.
Add support for //!< doxygen comment (i.e. not confused it with io transientness).

This fixes ROOT-6888.
Remove CINT support
Finish commit 5477417 (related to ClassDefOverride)
Reduce code duplication merge _ClassDefNV_ into _ClassDef_.

By adding an arguement for whether the virtual keyword is wanted or not
Cache successful mapping of PCH to filesystem paths (ROOT-6865).
Move check from TClass::GetClass to TCling::CheckClassInfo

with the advantage of not calling TEnum::GetEnum for fundamental
types.
Indeed it is now after the check
   THashTable *typeTable = dynamic_cast<THashTable*>( gROOT->GetListOfTypes() );
   TDataType *fundType = (TDataType *)typeTable->THashTable::FindObject( name );
Add some checks on input (see JIRA item ROOT-6890)
Avoid recursive call to TClass during the creation of TClass instances
Change davix default for GridMode. ROOT-6897
New version of RootUseFile with less settings
Documentation: New version of Http Server + new chapter for JavaScript ROOT
Make use of the gcctoolchain option (needed for llvm/clang on Linux)
Expected returncode != 0 in hist/hbars.C
Cleanup of compilation flags for gcc and clang

o no-schedule-insns, no-inline  is not needed at O0
o remove O2 optimisation for debug builds
Cleanup of compilation flags for gcc and clang

o no-schedule-insns, no-inline  is not needed at O0
Use -Wno-deprecated-declarations also for clang builds