add goreleaser support

.travis.yml

@@ -1,12 +1,18 @@
 language: go
 sudo: false
 go:
-  - 1.6.3
-  - 1.7.1
-  - tip
+  - 1.8.x
+  - master
 env:
+  global:
+    - GO_FOR_RELEASE=1.8
   matrix:
     - GOARCH=amd64
     - GOARCH=386
+matrix:
+  allow_failures:
+    - go: master
 script:
   - go test -x ./...
+after_success:
+  - if [ -n "$TRAVIS_TAG" ]; then curl -sL https://raw.githubusercontent.com/tsuru/push-to-packagecloud/master/push.sh | PACKAGE_NAME=deploy-agent bash; fi

goreleaser.yml

@@ -0,0 +1,17 @@
+# goreleaser.yml
+# Build customization
+build:
+  main: ./main.go
+  binary: tsuru_unit_agent
+  goos:
+    - linux
+  goarch:
+    - amd64
+
+# Archive customization
+archive:
+  name_template: "{{.Binary}}_{{.Version}}_{{.Os}}_{{.Arch}}"
+  format: tar.gz
+  replacements:
+    amd64: amd64
+    linux: linux