Add support for receiving X descriptors (works on console)

Stratosphere: Add debugging to loader, it can now be talked to on console successfully.

Stratosphere: Skeleton actual IPC dispatch in ServiceSession

Stratosphere: Add missing priority updates

Stratosphere: Fill out Loader main(), fix template classes.

Turns out WaitableManager->delete_waitable() wasn't needed

Stratosphere: Add IWaitable, WaitableManager

Stratosphere: Skeleton templated IPC Server code

Stratosphere: Skeleton ldr:shel

Stratosphere: Skeleton more of ldr:dmnt->Dispatch()

Stratosphere: Skeleton ldr:dmnt

Stratosphere: Fix removed add() in Launch Queue

Stratosphere: Launch Queue C style lib -> namespace

Stratosphere: Add Launch Queue to Loader ...

Modified from RE done by @ogniK5377

Fix C++ header includes

Stratosphere: Make dir for loader