Travis CI (#155)

* try using travis

* comments

* docker

* fix

* fix

.travis.yml

@@ -0,0 +1,17 @@
+sudo: required
+
+language: python
+
+services:
+  - docker
+
+before_install:
+  - docker pull ubuntu:16.04
+
+script:
+  - set -o errexit
+  - echo "running..."
+  - docker build --build-arg TEST_TARGET="$TEST_TARGET" .
+
+notifications:
+  email: false