Collecting the following (more significant) updates:
  - Picking up some of the externals' sources from the ATLAS webpage now;
  - Introduced "purgeBuild" steps for some of the externals;
  - Updated the way HDF5 is built;
  - Some environment setup fixes for Qt5;
  - Updated the converter generator code to be compatible with Gaudi v30r2;
  - Improvements to the Python byte-compilation code;
  - Updated AthenaExternals to LCG_93;
  - Added ACTS as an external to AthenaExternals.

Tag to be used with the 21.X branches of Athena.
Main updates in this tag:
  - Switched AthAnalysisExternals to LCG_93, and updated the standalone packages to build the same versions of the externals as what LCG_93 has;
  - Moved a bunch of source tar files to the new ATLAS EOS webserver;
  - Cleaned up the "find modules" a bunch, improving the suppression of locally installed libraries when using an LCG release;
  - The macOS builds now only build TGZ files with CPack by default;
  - Updated many packages to perform full/clean builds when they need to build a new version of their external;

Collecting the following updates:
  - Updated the "standalone externals" to be in sync with LCG_93, and updated AthAnalysisExternals to build against LCG_93;
  - Updated the CPack configuration to only build TGZ files on macOS;
  - Some small tweaks to how the python byte-code building targets would show up in IDEs like Xcode;
  - Update to atlas_add_test(...) to allow using any directory as the run directory for a given test;
  - Taught the code not to pick up .git/ directories while installing a release (relevant only for analysis repositories);
  - Added an optional NOEXEC argument to atlas_add_test(...) to allow for tests where the success of the build is the test itself;
  - Added Findlibffi.cmake to be able to set up this library for the runtime environment, which LCG_91's glib installation depends on.

Tag to be used with the master (22.0.1) branch of atlas/athena.

Retro-actively creating a 2.0.0 tag that corresponds to the "release/22.0.0" tag of atlas/athena.

Collecting the following updates:
  - Fixed the RPM dependency set up by FindHDF5.cmake, not to be confused by the HDF5 version that we may build ourselves;
  - Updated FindBoost.cmake to use Threads::Threads instead of CMAKE_THREAD_LIBS_INIT for setting up the pthread dependency for the Boost libraries;
  - Updated all projects to instruct CMake's FindThreads.cmake module to prefer the -pthread compiler flag instead of the -lpthread linker option.

Collecting the following updates:
  - Made the RPM building skip stripping binaries. To be able to use a non-standard linker during the build without the RPM building messing up the produced (static) libraries.
  - Fixed a problem that was introduced for the analysis python externals back in 1.0.26, when pip was added to the analysis releases.
  - Upgraded to lwtnn version v2.6.
  - Fixed FindHDF5.cmake so that it would find the HDF5 version provided by the analysis releases properly on lxplus.

Collecting the following updates:
  - Added a FindPNG.cmake module to AtlasLCG, and made sure that it would be able to find the PNG library from the LCG release;
  - Added libxml2 to AnalysisBaseExternals, and made the ROOT build make use of it;
  - Stopped the ROOT build from looking for BLAS, as that makes the build depend way too much on libraries available only on lxplus;
  - Made the dictionary generation code more robust in the CI system.

Collecting the LCG_91 updates/fixes from MR208 into a tag.

Collecting the following updates:
  - An update from Frank for making Ninja builds a bit more silent;
  - Upgraded the AthAnalysisExternals to use LCG_91, and the externals built by AnalysisBaseExternals to match the versions found in LCG_91.

Tag updating the APE build to take the source code from github.com/samikama/APE.git, where the latest updates of the code are collected.

Collecting the following updates:
  - Improved the PoolCnv/SerCnv library creation to handle the case correctly when a converter gets removed as part of a CI job;
  - Added some new IDE improvements for Xcode/VisualStudio users;
  - Added a path to the FastJetContrib build to make it work more robustly on macOS. (See: https://fastjet.hepforge.org/trac/changeset/1092)
  - Added HDF5 as an external to AnalysisBaseExternals and AthAnalysisExternals;
  - Silenced a previous git error/fatal message showing up when the source directory would not be a git repository;
  - The installation of python modules with atlas_install_python_modules(...) now byte-compiles the modules during the build, testing them for syntax errors;
  - RelWithDebInfo builds now have the ability to produce two RPMs, one holding the non-debug payload (as before), and an additional one that only holds the debug symbol files;
  - Added pip to both AnalysisBaseExternals and AthAnalysisExternals, to allow analysers to download additional python modules for their analysis.

Tag for fixing the RPM dependency issue introduced by 1.0.24, using a wrong name for the LCG LibXml2 dependency.

Collecting the following updates:
  - Added lwtnn to the AthDerivationExternals build;
  - Improved the Geant4 relocatability;
  - Updated to fjcontrib 1.030;
  - Added GPerfTools to the AthAnalysisExternals build;
  - Fixed the handling of libxml2 from Athena, so that it would be used properly from inside the LCG release.

Update for making Python (python-config) relocatable, allowing python modules to be built conveniently against a release/nightly from CVMFS.

Updates containing:
   - updates to make AnalysisBaseExternals build out of the box on top of macOS High Sierra with Xcode 9.0;
   - the ability to override (from the command line) which LCG version the LCG using external projects should build against;
   - a fix for building lwtnn on platforms providing an acceptable version of Boost, like Ubuntu 16.04;
   - a small fix for BAT to build correctly against LCG_91.

Update containing:
   - Explicit builds of XRootD and DCAP for the standalone build of ROOT;
   - Addition of the lwtnn external for the analysis and offline releases;
   - Small fix to reduce the lines printed by AthAnalysisExternals;
   - Some updates to the GCC checkers code.

Tagging the following changes in the 1.0 branch:
  - Made the ROOT build work out of the box on MacOS.
  - Included the updates made in the package selection code. Printing loud warnings when the user made a mistake.
  - Added a whole bunch of copyright statements to all the files, now that the repository is globally visible.
  - Added the build of LHAPDF to AthDerivationExternals.

Tagging the latest updates for making the AnalysisBaseExternals build more robust, and getting rid of a warning during the build of dSFMT.

Tagging the update made to the ROOT build, meant for AnalysisBase/AnalysisTop. For a more robust setup in grid running.