Currently there's only a single dummy implementation, which will be
split in a following commit.

This removes all implicit dependency of ShaderState on global PICA
state.

Service/NFC: stub some functions

Fixing some MSVC warnings

Changed the FAQ link so it leads to the FAQ on the Citra website, instead of the FAQ hosted
on GitHub

Removed unused and outdated external qhexedit

HID: reset acceleroeter and gyroscope index in Init

Updated Citra forum link

The Citra forum (discuss.citra-emu.org) has recently been down. The link that has been added 
in this file now leads to an error pages. I update updated the link so it now leads to Citra's new
forum.

loader: Add support for 3DSX special relocation types

As per devkitPro/3dstools@47bea18

HID: manages updating itself using correct ticks

Tested on: Mini-Mario & Friends - amiibo Challenge

GSP::WriteHWRegsWithMask: fix register mask

SDL2: Config, fix double to float warning

Qt: Fix UI related warnings and bonus ui file format 

Implement some TODOs in the code.

Service/AC: add ac:i service

Threads: Check the process' resource limit for the max allowed priority when creating a thread and remove the priority clamping code.

Thread: Added priority range checking to svcSetThreadPriority and removed priority clamping code from Thread::SetPriority.