Introducing goreleaser for building binary packages

For automatic creation of binary packages, introducing goreleaser
(see https://github.com/goreleaser/goreleaser).

Resolves: #2

.gitignore

@@ -3,3 +3,4 @@
 kafka-health-check
 vendor/*/
 compatibility/vendor/*/
+dist/*

.goreleaser.yml

@@ -0,0 +1,9 @@
+builds:
+  - main: main.go
+    binary: kafha-health-check
+    goos:
+      - darwin
+      - linux
+      - freebsd
+    goarch:
+      - amd64

.travis.yml

@@ -16,3 +16,6 @@ install:
 script:
   - make test-no-race
   - make compatibility
+
+after_success:
+  - test -n "$TRAVIS_TAG" && curl -sL https://git.io/goreleaser | bash

Makefile

@@ -5,9 +5,9 @@ install:
 	@go install .
 
 deps:
-	@go get -u github.com/kardianos/govendor
+	@go get -u -v github.com/kardianos/govendor
 	@govendor sync
-	cd compatibility; govendor sync
+	@cd compatibility; govendor sync
 
 test: build
 	@go fmt . ./check