Add monitor for music play

[gavin-lin]

1. Done by monitoring setMedia() in write events.
2. The function name 'write' is really misleading, but since we are going to make output more readable, we can deal with this that time.
3. Because of item 2, I don't want too many write events show up in other apps, but I have not found good way to sort them yet, so I just filter them out except the one with setMedia().

[gavin-lin]

This will fix issue #92

[Cypresslin]

I think you can move this part to group with line 68

First check if it's a write event,
Check if it's the desired event setMedia()
Yes -> call printer
No -> continue the loop

[gavin-lin]

I was thinking to separate supressor from other codes, so if we need more write events, we can modify the supressor easily.

[Cypresslin]

Make sense, thank you.