The url of documentation in README is incorrect. 

http://zk1931.github.io/jzab/master/ doesn't have the most updated doc.

I guess the reason is : 
```
cp -Rf $VERSION master
```
Since the master directory has already existed so the $VERSION directory will be copied inside master directory instead overwrote master directory. Like http://zk1931.github.io/jzab/master/0.3.0-SNAPSHOT/

Probably we should delete master directory first? 

@m1ch1