Multi monitor support

[Kuzat]

There is no multi monitor support as of now. It should probably be implemented.

[kkm]

No it support that, you need coord of multi monitor.

[Kuzat]

@kkm which OS did you test that on? I don't think it works for all OS

[kkm]

Win 10

[Kuzat]

So multi monitor work for now just need to know the coords for the multi monitor. What doesn't work is that the special case of specifying width and height as 0 only takes a fullscreen screenshot of the main monitor. I think the best solution is to make a new separate command for taking fullscreen screenshot and have a option for it to take of only one monitor or all of them.