Continous integration through Travis CI (#71)

* Adding Travis CI badge

* Modifying end to end tests to reflect testing against docker-compose setup in Travis CI.

* Adding bash script to run simple container with tests within bridge network for Mac.

* Adding documentation for setting up a developer environment.

* Decreasing amount of CPU needed for CreateJobWithPulse because a higher value causes Travis CI to hang.

.travis.yml

@@ -0,0 +1,15 @@
+sudo: required
+
+language: go
+
+go:
+  - "1.10.x"
+
+services:
+  - docker
+
+install:
+  - docker-compose up -d
+
+script:
+  - go test -v github.com/paypal/gorealis