travis-ci/travis-build — pull request #37 by joshk (2012-10-14 21:18:56+00:00)
Title: Pull Request number updates

This removes `TRAVIS_PULL_REQUEST_NUMBER` and instead sets `TRAVIS_PULL_REQUEST` to false if it isn't a PR and to the PR number if it is a PR.

This is already in [travis-core](https://github.com/travis-ci/travis-core/blob/master/lib/travis/api/v0/worker/job/test.rb#L28)