Remote disc streaming

[[Unknown]]

The latest git builds have a new feature, which allows streaming discs to mobile devices. This is useful when your mobile device doesn't have tons of storage.

Just wanted to give a few notes about the feature:

* It's found under Settings -> Tools -> Remote disc streaming.

* Both devices must be connected to the same wifi router / network.

* You run PPSSPP on both devices - "share" from your desktop (or any device), and "browse" from your mobile.

* Leave PPSSPP open while sharing. You don't need to stay on the sharing screen.

* The game is still emulated on the mobile device as always, only the disc is streamed to the device.

* Some storage space will still be used on the mobile device to cache data for performance reasons.

* For best results, change Settings -> System -> I/O timing method to "Host (bugs, less lag)". This will give you loading screens like on a PSP when loading data.

-[Unknown]