Fix Coveralls support

.travis.yml

@@ -3,13 +3,12 @@ sudo: false
 language: go
 
 go:
-  - 1.5
   - tip
 
-install:
-  - go get golang.org/x/tools/cmd/cover
+before_install:
+  - go get github.com/axw/gocov/gocov
   - go get github.com/mattn/goveralls
+  - if ! go get github.com/golang/tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
 
 script:
-  - go test -v ./xmpp -covermode=count -coverprofile=coverage.out
-  - $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken $COVERALLS_TOKEN
+    - $HOME/gopath/bin/goveralls -service=travis-ci