Move tests into their own crate

.travis.yml

@@ -9,6 +9,7 @@ before_script:
   - pip install 'travis-cargo<0.2' --user && export PATH=$HOME/.local/bin:$PATH
 script:
   - cargo test
+  - cargo test --manifest-path test-suite/Cargo.toml
   - rustdoc --test README.md -L target
   - test "$TRAVIS_RUST_VERSION" != "1.15.0" && cargo doc --no-deps || echo "skipping cargo doc"
 after_success:

test-suite/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "toml_test_suite"
+version = "0.0.0"
+authors = ["Alex Crichton <alex@alexcrichton.com>"]
+publish = false
+
+[build-dependencies]
+rustc_version = "0.2"
+
+[dev-dependencies]
+toml = { path = ".." }
+serde = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"