update .gitignore

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
add inotify

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
inotify cleanup

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
add catch signal example

Signed-off-by: Fudong Bai <fudongbai@gmail.com>