Implement TProfile::SetBinLength  to update the profile structure when the number of bins has changed.
This fixes the problem callingTProfile::Rebuild (fix ROOT-5611)
Remove stray ;
Fix TH2::FillRandom (ROOT-5608)
Fix a compiler warning
Use in TH2::FillRandom to use only TF2 class
Fix in case Pythia8 headers are in /usr/include. Fixes ROOT-5812.
Fix timestamp with timezone handling for TPgSQLStatement. Fixes ROOT-5811.