add go install to makefile for all binary

Makefile

@@ -14,16 +14,25 @@ GOGET=$(GOCMD) get $(OPT_VERBOSE)
 SRCS := $(wildcard *.go)
 # This is a substitution reference. http://www.gnu.org/software/make/manual/make.html#Substitution-Refs
 BINS := $(SRCS:%.go=bin/%)
+INSTALLBINS := $(SRCS:%.go=$$GOPATH/bin/%)
 
 all: $(BINS)
+install: $(INSTALLBINS)
 
-$(BINS) : bin/% : %.go | bin
+$(BINS): bin/% : %.go | bin
 	@echo "constructing : $@"
 	@$(GOBUILD) -o "$@" "$^"
 
+$(INSTALLBINS): $$GOPATH/bin/% : %.go
+	@$(GOINSTALL) "$^"
+
+bin: 
+	@mkdir bin
+
 clean:
 	$(GOCLEAN)
 	rm -f ${GOPATH}/bin/$(PROGRAM_NAME)
 
 get: 
 	$(GOGET) github.com/docker/docker-credential-helpers/client
+