Don't change to spew dir before invoking goveralls.

.travis.yml

@@ -7,5 +7,4 @@ script:
 after_success:
     - go get -v github.com/mattn/goveralls
     - export PATH=$PATH:$HOME/gopath/bin
-    - cd ./spew
     - goveralls -coverprofile=profile.cov -service=travis-ci