Use travis to run CI

.travis.yml

@@ -0,0 +1,30 @@
+---
+language: rust
+sudo: false
+
+matrix:
+  include:
+    - rust: stable
+    - os: osx
+    - rust: 1.19.0
+      script: cargo build
+
+    - rust: beta
+    - rust: nightly
+      before_script:
+        - pip install 'travis-cargo<0.2' --user && export PATH=$HOME/.local/bin:$PATH
+      after_success:
+        - travis-cargo doc-upload
+
+script:
+  - cargo test
+  - rustdoc --test README.md -L target/debug/deps
+  - cargo doc --no-deps
+
+env:
+  global:
+    secure: "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"
+
+notifications:
+  email:
+    on_success: never