Add travis

.travis.yml

@@ -0,0 +1,14 @@
+sudo: false
+dist: trusty
+language: rust
+matrix:
+  include:
+    - rust: nightly
+script:
+  - cargo update
+  - cargo build
+  - cargo test
+cache:
+  cargo: true
+before_cache:
+  - chmod -R a+r $HOME/.cargo