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Removed unused and outdated external qhexedit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

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.

 Kernel: Implemented Pulse event and timers.

Prevents appveyor from attempting to deploy except on the nightly repo

config: Add option for specifying screen resolution scale factor.

Emulate motion sensor in frontend

Don't yield execution in SleepThread(0) if there are no available threads to run

Kernel/Semaphore: Fixed a regression in semaphore waits.

Closes #2400

Kernel: Removed the priority boost code for starved threads.

Kernel: Don't attempt to yield execution in SleepThread(0) if there are no available threads to run.

With this we avoid an useless temporary deschedule of the current thread.

Kernel: Remove some unused functions.