language: rust
rust:
  - stable
  - beta
  - nightly
script:
  - cargo build --verbose
  - cargo doc
  - cargo test --verbose
  - if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then
      cargo bench --verbose;
    fi

language: rust
rust:
  - 1.7.0
  - stable
  - beta
  - nightly
script:
  - cargo build --verbose
  - cargo doc
  - cargo test --verbose
  - if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then
      cargo bench --verbose;
    fi

Add Rust 1.7.0 to Travis.
Add Rust 1.7.0 to Travis.

I doubt this is the actual initial minimum Rust version supported, but
it's the minimal version that works now.
