v1.1.1 - Fix bugs

1. Fixbug: after call fun, code execute more than one time. 修复在调用run函数之后，的代码会执行多遍的BUG。

v1.1 - Change entrance class name.

1. Change entrance class name JobForkerManager to JobForker. 将入口类名更改为了JobForker
2. Add some comment. 添加了些许注释

v1.0 - Have fun!

1. Execute script with multi process. 脚本多进程执行
2. Continue last job which last time stopped. 支持中断续运行
3. Memory overload protection. 内存过载保护
4. Timing report progress. 定时报告进度
5. Highly configurable. 高度可配置