fRenderer, the TMathText Painter, should not be stored.
Fix https://sft.its.cern.ch/jira/browse/ROOT-6259
Fix for https://sft.its.cern.ch/jira/browse/ROOT-5817 (configure checks for freetype-config but then ignores it for #includes)
Reduce the number of Flush (fsync) when closing a TFile.

Rather than doing one call to Flush (fsync) per TDirectory during the execution of TFile::Close
we reduce this to just one call.  Doing so many sync was extremely slow on an ATA disk (order
of 5 minutes for 90000 TDirectories.  With this update the time is down to half a second.
Formatting....
Check for tab container existence, see ROOT-6253.
Fix 2 bugs appearing as a side-effect of the previous fix:

- when cloning fBinHist -call SetDirectory(0) since the TH1(2)Editor manage the histogram
- add the TH1(2)Editor must be registered in the list of cleanups so the contained fHist pointer is set to zero when the referred histogram is deleted
Merge from master the commit 51021491ea9e6dc410cd38fca2a7b0ce6b984ae4

- improve all MinimumBuilder classes :
 - add a print level flag which can be used to control output
 - add a storage level flag which can suppress storing of MinimumState for each iterations
  (useful in problem with large number of parameters >~ 1000) to reduce memory
- add possibility to debug each iteration ny setting anew object MnTraceObject which will be called for every new iteration
- add an example class which histogram function value, edm, and parameters for each iteration
- add in Minuit2Minimizer possibility to enable these new options
Fixes for an error in dictionary generation of TMinuit2TraceObject
Fix for Ubuntu
Silence -Waddress warning in TXSocket.cxx
Fix for 32 bit arch (skip a test which is likely to fail due to use of extended precision)
TGaxis::SetMaxDigits was not active on standalone TGaxis.
The transparency sliders change the transparency only for the currently edited object. (ROOT-6251)
add a dummy test in case of 32 bits arch to have same output file
Another fix for 32 bits arch. Skip the rotation tests
Implement correctly the projections from a TProfile2D to TProfile and from a TProfile3D to a TProfile2D.
Add corresponding tests in stressHistogram.
This fixes bug ROOT-6220