Update README

README.md

@@ -1,7 +1,63 @@
 # Tieba Sign in Go
 
-This project is **UNFINISHED**
+**WARNING: This project is currently under BETA, use it on your risk**
 
-To enjoy Tieba Sign, please download from the old project:
+A faster && lighter sign robot for http://tieba.baidu.com which can help you get more credit at tieba.
 
-https://github.com/kookxiang/Tieba_Sign
+## Usage
+
+Notice: if you want to sign in automatically, please add it to crontab list (for Linux) or Task Schedule (for Windows) to run at every morning.
+
+## Single Mode / User Interactive Mode
+
+Just execute the compiled program :D
+
+Input username and password to login if you use this program at first time.
+
+If verification code is needed, a file named `captcha.jpg` will be downloaded to current directory, and you need to open and type it to the program.
+
+If you cannot login via user interactive mode, you need to gather cookie information by yourself. Put a file named `cookie.txt` in current directory with the following format:
+
+```
+BDUSS=YOUR-BDUSS-SECRET-CODE-IN-COOKIE
+(Others is optional)
+```
+
+Once you'd logged in, a `cookie.txt` file will generated automatically. And next time you run it, you will not need to login again.
+
+### Multi-User Mode / Batch Mode
+
+Just create a directory named `cookies` and copy the `cookie.txt` file to the new `cookies` directory, you can change the file name on your own (but please keep the `.txt` extensions).
+
+Now you can put more `.txt` named cookie files into `cookies` folder.
+
+Execute the program with parameter `-batch`, the program will handle all user by the same time.
+
+If you execute this little program by batch mode, it will create go routines for every user and sign it in same time. (Like multi-thread, but more effective. [Learn More](https://golang.org/doc/effective_go.html#goroutines))
+
+## Installation
+
+You can both compile this program by yourself of just download the prebuilt version.
+
+If you don't know how to compile it, please [Click here to DOWNLOAD](https://github.com/kookxiang/Tieba_Sign-Go/releases) the prebuilt version.
+
+### Compile
+
+1. First, install go environment on your system and configure GOPATH.
+
+2. Install dependency:
+
+   ```shell
+   go get github.com/bitly/go-simplejson
+   go get golang.org/x/text/encoding
+   go get golang.org/x/text/encoding/simplifiedchinese
+   go get golang.org/x/text/transform
+   ```
+
+3. Compile project
+
+   ```shell
+   go build
+   ```
+
+4. You're done!