Use proper size_t instead of ssize_t which is not defined in MSVC
Continue iteration even if the first context is empty (part of ROOT-6094).
Roll back workaround of ROOT-6094

proper fix is in.
Remove the stamp and use the ALLHEADERS variable
If the value is not set (due to errors in the runtime evaluation), return default.
Give access to function overloads (ROOT-6094).

Re-implements THashList::GetListForObject() - as if this "THashList" has a gasillion objects and thus each bucket only contains one name.
The lists of overloads are cached to prevent heap allocations unless an update is needed.
PyROOT can now query the overloads if no matching overload is known to it; GetListForObject() will retrieve all currently known overloads of all matching decl contexts and generate TFunction / TMethod objects for them.
Fix doxygen.
Manual focus management.
Trailing blanks
Implement cling::Transaction unique id.
Create output results directory if does not exists.
This fixes ROOT-5481
Apply fixes in copy ctor and assignment op. for Coverity
Add missing include file (unistd.h) defining ssize_t
Fix the PrintXML according to HistFactory.dtd  (InputFileLow/High -> HistoFileLow/High)
This fixes ROOT-5480
Fix stressHistfactory tests to build API model by passing correctly histoname and his to path.
In this way the model can be written correctly in an XML file.
Do come clean-up of code in PrintXML methods
Update documentation of Channel.h and Data.h update meaning of histoname and histopath
Add roofit dependency for mathcore/test/fit/testFitPerf
Move definition of ClassDefInterp to Rtypes.h (ROOT-4769).
Allow to change compilation flags for single executables in CMake
Fix comp. warnings and clang incompatibilities with __extern_always_inline
consistent getter for number of threads