Re-enabled the YAML file format processing.

.travis.yml

@@ -4,12 +4,13 @@ services:
 language: go
 go:
 - '1.7'
-# Make sure we have p2
+# Make sure we have p2 and the postgres client.
 before_install:
 - sudo wget -O /usr/local/bin/p2 https://github.com/wrouesnel/p2cli/releases/download/r4/p2 &&
   sudo chmod +x /usr/local/bin/p2
 - sudo wget -O /usr/local/bin/docker-compose https://github.com/docker/compose/releases/download/1.9.0-rc4/docker-compose-Linux-x86_64 &&
   sudo chmod +x /usr/local/bin/docker-compose
+- sudo apt-get update && apt-get install postgresql-client-common
   
 script:
 - make all