Explicitly provide supported versions of Cbc

The packaged Cbc binaries are quite old (2 years). So I've built my own more modern version of Cbc using coinbrew, which sort of works. But Cbc behaves variously in strange ways, some of which are documented in other issues here. Would it be possible perhaps to provide explicitly supported versions (or even just commits on master) of Cbc, so that we can be sure the binaries we build are compatible?