Use GIMME_OS and GIMME_ARCH

.travis.yml

@@ -2,16 +2,15 @@ language: go
 go:
   - 1.5
 env:
-  - "PATH=/home/travis/gopath/bin:$PATH"
+  - GIMME_OS=linux GIMME_ARCH=amd64
+  - GIMME_OS=darwin GIMME_ARCH=amd64
+  - GIMME_OS=windows GIMME_ARCH=amd64
+  - GIMME_OS=linux GIMME_ARCH=arm GOARM=6
+  - GIMME_OS=linux GIMME_ARCH=arm GOARM=7
 before_install:
-  - go get github.com/mitchellh/gox
-  - go get github.com/tcnksm/ghr
   - go get github.com/axw/gocov/gocov
   - go get github.com/mattn/goveralls
   - go get golang.org/x/tools/cmd/cover
 script:
   - go test -v -covermode=count -coverprofile=coverage.out ./...
-  - goveralls -coverprofile=coverage.out -service travis-ci -repotoken $COVERALLS_TOKEN
-after_success:
-  - gox -cgo -output "dist/{.OS}_{.Arch}_{.Dir}" -osarch "darwin/amd64 linux/amd64"
-  - ghr --username edvakf --token $GITHUB_TOKEN --replace --prerelease --debug pre-release dist/
+  - $GOPATH/bin/goveralls -coverprofile=coverage.out -service travis-ci -repotoken $COVERALLS_TOKEN