Moving comments
Moving comments
Using asyncio to parse Stdin

Defining class AsyncReader which basically starts an infinite loop
reading stdin. Each time it encounter '\n', it pulls the line to a FIFO
buffer of 4 lines, and tasks a coroutine to parse the buffer (currently,
it just print it)

On Scroll_Lock as stdin, it quits.
making the program print 'Scroll_Lock' on exit:

to permit keylog_parser.py to quit properly.