AudioCore: Implement Pipe 2

Set the appropriate locale to get float conversion working using to_string

Pipe 2 is a DSP pipe that is used to initialize both the DSP hardware (the
application signals to the DSP to initialize) and the application (the DSP
provides the memory location of structures in the shared memory region).

Pica: Write depth value even when depth test is disabled

Memory: Do correct Phys->Virt address translation for non-APP linheap

core: Use unrestricted union to hold storage of ResultVal value

This has been confirmed on hardware. Fixes Etrian Odyssey IV.

DSP: Print hash of firmware to console

Loader/NCCH: Log the program ID during loading

This is useful for all sorts of things, but mainly to identify save
folders more easily.

ac:u IsConnected implemented

Stub CAM:U service

externals: Remove unused GLFW library from the repo.

Update Building Links

Links on README.md don't exist.

Add immediate mode vertex submission

Dependencies: Remove GLFW, Add SDL2

Add THREADPROCESSORID_ALL on SVC::CreateThread

citra: Remove GLFW, Add SDL2

FindSDL2: Do not CACHE SDL2_* variables if library is not found

EmuWindow_SDL2: Set minimal client area at initialisation time

EmuWindow_SDL2: Corrections

EmuWindow_SDL2: Fix no decorations on startup on OS X

cmake: windows_copy_files

DiskDirectory: Initialize the directory member with valid info.

Service/CFG: Add block 0x000A0000 (username) to default config file

x64 Emitter: Fix L bit in VEX prefix

Initial implementation ir:user

Add check before closure when emulation is running

renderer_opengl: Initalise fragment shader LUT textures

Audio Core: Skeleton