bump version to v1.7.1

Makefile

@@ -1,6 +1,6 @@
 OUTPUT_DIR = ./builds
 GIT_COMMIT = `git rev-parse HEAD | cut -c1-7`
-VERSION = 2.7.0
+VERSION = 2.7.1
 BUILD_OPTIONS = -ldflags "-X main.Version=$(VERSION) -X main.CommitID=$(GIT_COMMIT)"
 STATIC_OPTIONS = -ldflags "-extldflags='-static' -X main.Version=$(VERSION) -X main.CommitID=$(GIT_COMMIT)"
 
@@ -67,9 +67,9 @@ js/node_modules/webpack:
 	npm install
 
 tools:
-	go get github.com/mitchellh/gox
-	go get github.com/tcnksm/ghr
-	go get github.com/jteeuwen/go-bindata/...
+	go install github.com/mitchellh/gox@latest
+	go install github.com/tcnksm/ghr@latest
+	go install github.com/go-bindata/go-bindata/...
 
 test:
 	if [ `go fmt $(go list ./... | grep -v /vendor/) | wc -l` -gt 0 ]; then echo "go fmt error"; exit 1; fi