Add Travis-CI Integration

This makes Travis run `cargo build` and `cargo test`, making sure that we never
push broken code.

Author: reem

.travis.yml

@@ -0,0 +1,11 @@
+install:
+  - wget http://static.rust-lang.org/dist/rust-nightly-x86_64-unknown-linux-gnu.tar.gz -O - | sudo tar zxf - --strip-components 1 -C /usr/local
+  - yes | sudo add-apt-repository ppa:cmrx64/cargo
+  - sudo apt-get update
+  - sudo apt-get install cargo
+script:
+  - cargo build
+  - cargo test
+os:
+  - linux
+