Sync with linux/drivers/staging/ktap

ktap is already merged into Linux kernel staging tree,
sync it to make a same code base.

- update email name from "zhangwei(Jovi)" to "Jovi Zhangwei"
- move lua copyright notice to individual files
- remove docs target in Makefile, because css file was also removed

Signed-off-by: Jovi Zhangwei <jovi.zhangwei@gmail.com>