travis-ci/travis-core — pull request #63 by dvyjones (2012-05-23 12:43:29+00:00)
Title: Implement matrix.include

This was suggested in travis-ci/travis-ci#493.

I had a go at implementing and testing this. Looks like it should work, it's actually quite simple. `include` overrides `exclude`, which seems correct to me, but I can change that around if people feel differently.