language: rust
rust: 1.0.0-beta.3
branches:
  only:
    - master
notifications:
  slack:
    secure: QpFHoGnFmO56Dc7PZzYEqeVbT0II7QCAYc7V0Xm4cV4NKLcz2DjBw523G+cCa7cewWVdhOooUKA14H6wjCHdqReMR7xO7iOGQm/p7iSMgU9eMlIvem0jBDGqxo/8R5GtA/OVZ6SB93ja+BaZiYaapsaQcTfxNxxeopecKus0z44=

language: rust
rust: nightly-2015-05-01
branches:
  only:
    - master
notifications:
  slack:
    secure: QpFHoGnFmO56Dc7PZzYEqeVbT0II7QCAYc7V0Xm4cV4NKLcz2DjBw523G+cCa7cewWVdhOooUKA14H6wjCHdqReMR7xO7iOGQm/p7iSMgU9eMlIvem0jBDGqxo/8R5GtA/OVZ6SB93ja+BaZiYaapsaQcTfxNxxeopecKus0z44=

Update Travis CI Rust version to Nightly 2015-05-01
Update Travis CI Rust version to Nightly 2015-05-01

I *believe* this should work: Travis CI seems to use `rustup.sh` to
install the required Rust version by specifing `--spec=%s` where %s
corresponst to the provided rust version. Using `rustup.sh
--spec=nightly-2015-05-01` seems to work locally, so it just might also
work on Travis CI.
