修改makefile 构建制品名称，修改说明文件

README.md

@@ -5,7 +5,12 @@ Java Version  Manager
 
 
 ## 安装
-  默认文件下载安装在用户目录下 ```.j```
+  [下载](https://github.com/forget-the-bright/j/releases) 下载自己需要的版本, 到自己自定义的目录 修改可执行文件名称为j
+  
+  默认文件下载安装在用户目录下 ```.j```目录，目录下  ```versions```, ```downloads```, ```java```  分别是本地安装目录，安装包下载目录，当前使用的java版本目录 
+
+  将 JAVA_HOME 配置为 ```USER_HOME\.j\java```  
+
   指定安装目录需要 添加环境变量 ```J_HOME```
 ## 命令
 

makefile

@@ -19,7 +19,7 @@ build-linux: build-linux-386 build-linux-amd64 build-linux-arm build-linux-arm64
 build-linux-386:
 	GOOS=linux GOARCH=386 $(GO) build $(GO_FLAGS) -o bin/linux-386/j
 build-linux-amd64:
-	GOOS=linux GOARCH=amd64 $(GO) build $(GO_FLAGS) -o bin/linux-amd64/j
+	GOOS=linux GOARCH=amd64 $(GO) build $(GO_FLAGS) -o bin/linux-amd64/linux_amd_x86_64_j
 build-linux-arm:
 	GOOS=linux GOARCH=arm $(GO) build $(GO_FLAGS) -o bin/linux-arm/j
 build-linux-arm64:
@@ -39,7 +39,7 @@ build-windows: build-windows-386 build-windows-amd64 build-windows-arm build-win
 build-windows-386:
 	GOOS=windows GOARCH=386 $(GO) build $(GO_FLAGS) -o bin/windows-386/j.exe
 build-windows-amd64:
-	GOOS=windows GOARCH=amd64 $(GO) build $(GO_FLAGS) -o bin/windows-amd64/j.exe
+	GOOS=windows GOARCH=amd64 $(GO) build $(GO_FLAGS) -o bin/windows-amd64/windows_amd_x86_64_j.exe
 build-windows-arm:
 	GOOS=windows GOARCH=arm $(GO) build $(GO_FLAGS) -o bin/windows-arm/j.exe
 build-windows-arm64: