Travis integration. (#39)

* Added Travis integration.

* Added mousetrap for Windows.

* Removed go 1.6 from build.

.travis.yml

@@ -0,0 +1,9 @@
+language: go
+
+go:
+  - 1.x
+  - 1.7.x
+  - master
+
+install: make get-deps
+script: make build

Makefile

@@ -7,10 +7,21 @@ release:
 	@git push --tags
 .PHONY: release
 
-build:
-	@gox -osarch="darwin/386 darwin/amd64 linux/386 linux/amd64 openbsd/386 openbsd/amd64 window/386 windows/amd64" -output="dnote-{{.OS}}-{{.Arch}}" ./...
+build: get-deps install-gox
+	@$(GOPATH)/bin/gox -osarch="darwin/386 darwin/amd64 linux/386 linux/amd64 openbsd/386 openbsd/amd64 window/386 windows/amd64" -output="dnote-{{.OS}}-{{.Arch}}" ./...
 .PHONY: build
 
+get-deps:
+	@echo "** Downloading dependencies... **"
+	@go get -t ./...
+	@go get github.com/inconshreveable/mousetrap
+.PHONY: get-deps
+
+install-gox:
+	@echo "** Installing Gox... **"
+	@go get github.com/mitchellh/gox
+.PHONY: install-gox
+
 clean:
 	@git clean -f
 .PHONY: clean