Updated option switches

I updated the option switches slightly, I hope the changes are acceptable! :smile: 

| Switch | Description |
| -------- | ---------------|
| -l | List files , lead by [index] |
| -lu urlPattern | like -l , but filter by urlPattern |
| -lm  mimetypePattern |  like -l , but filter by response mimetype |
| -x   dir | eXtract all content to [dir] |
| -xi  index | eXtract the [index] content , need run with -l first to get [index] |
| -xu  urlPattern      dir | like -x , but filter by urlPattern |
| -xm  mimetypePattern dir | like -x , but filter by mimetypePattern |
| -xmd mimetypePattern dir | like -xm , but dump contents directly to [dir] |