support to turn locks off by renaming executable

Example:
* numlock.exe -> NumLock On
* numlockoff.exe -> NumLock Off

fix multiple match case

for example if file name is `nUm-caPs-scRl.exe` it would affect status of  `Num Lock` `Caps Lock` and `Scroll Lock`

use SendInput instead of keybd_event

* keybd_event function has been superseded refers to https://msdn.microsoft.com/library/windows/desktop/ms646304(v=vs.85).aspx
* can change status of Caps Lock and Scroll Lock now

Update README.md