Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.104:
  - Updated FindSuperchic.cmake to add the Superchic executables to the environment, and set up SUPERCHICPATH in the runtime environment as well;
  - Removed the PACKAGE_VERSION_UQ definition from the compilation commands;
  - Added the ATLAS_PACKAGE_NAME definition to all compilation commands executed in "ATLAS packages";
  - Removed the global setting of the HAVE_64_BITS, __IDENTIFIER_64BIT__ and FVOIDP compiler definitions.