In order to be able to figure out the matching MKL version for a given
compiler/MPI repository we emit a new macro '%matching_mkl_version' in
the cases this makes sense

Add macro compiler_repository to have early access to compiler name

See merge request mpcdf/osc-plugins!2

This can be used to disable multibuilds for certain compilers.

This avoids having to install two separate intel_parallel_studio
packages. It is probably also not a good idea anyway to inter-link two
of them at the same time.

Add aliases for mpcdf_set_as_branch, mpcdf_sync_projects

See merge request mpcdf/osc-plugins!1