Tag to be used ONLY WITH NIGHTLY BUILDS of the master branch of atlas/athena. Updates since the last tag: - Now picking up GDB 8.1 from the ATLAS EOS webpage; - Patching the source of BAT to produce correct ROOT dictionaries in an out-of-source build; - Added KLFitter to AnalysisBaseExternals and AthAnalysisExternals; - Disabled building (most of) the static libraries of Boost for AnalysisBaseExternals; - Switched to building ACTS from the head of the master branch of the ACTS git repository. This setting must never be used in a tagged release of atlas/athena! - Updated Findxz.cmake to only set up an RPM dependency on SLC6, as LCG doesn't provide this package on CentOS7.