coverage integration

Author: dsxack

.travis.yml

@@ -4,9 +4,12 @@ go:
   - 1.x
   - tip
 
-before_install:
+install:
+  - go get -u github.com/dave/courtney
   - go get -t -v ./...
 
+script:
+  - courtney -e
+
 after_success:
   - bash <(curl -s https://codecov.io/bash)
-