add `make deps`

Makefile

@@ -3,22 +3,24 @@ OK_COLOR=\033[32;01m
 ERROR_COLOR=\033[31;01m
 WARN_COLOR=\033[33;01m
 
-all:
+all: deps
 	@mkdir -p bin/
-	@echo "$(OK_COLOR)==> Installing dependencies$(NO_COLOR)"
-	@go get -d -v ./...
 	@echo "$(OK_COLOR)==> Building$(NO_COLOR)"
 	@./scripts/build.sh
 
+deps:
+	@echo "$(OK_COLOR)==> Installing dependencies$(NO_COLOR)"
+	@go get -d -v ./...
+	@go list -f '{{range .TestImports}}{{.}} {{end}}' ./... | xargs -n1 go get -d
+
 clean:
 	@rm -rf bin/ local/ pkg/ src/ website/.sass-cache website/build
 
 format:
 	go fmt ./...
 
-test:
+test: deps
 	@echo "$(OK_COLOR)==> Testing Packer...$(NO_COLOR)"
-	@go list -f '{{range .TestImports}}{{.}} {{end}}' ./... | xargs -n1 go get -d
 	go test ./...
 
-.PHONY: all format test
+.PHONY: all deps format test