Debugger: Use 3dbrew names for GPU registers

elf: Don't cast away const

key_map: Use std::tie for comparisons

archive_backend: Remove unnecessary const from return types

This doesn't return by reference so const isn't really necessary

This list was imported from the 3dbrew wiki page and is pretty much
complete.

hwrasterizer: Use depth offset

DisassembleMemHalf: actually use width in determining opcode name

command_processor: Get rid of variable shadowing

HLE/SVC: Implement UnmapMemoryBlock.

This implementation will need to be (almost completely) changed when we implement multiprocess support.

Add optional GL_KHR_debug support

Not much thought went into that one...

HLE/Sockets: Fixed the buffer offset in recvfrom.

Update appveyor.yml to use VS2015 CMake generator

Gamelist: supply default settings for QSettings config

services: Update some function tables

arm_dyncom_dec: Fix decoding of VMLS

Previously, all VMLS variants would misdecode as CDP
(which isn't necessarily wrong in itself, however
VMLS has it's own label of execution)

video_core: Make the renderer global a unique_ptr

HLE/Timers: Reset OneShot timers when they are acquired instead of when they're triggered

core: Use unique_ptr for holding the interpreter instances

Closes #1139

swrasterizer: Add missing override specifier

SVC: Fixed ArbitrateAddress to behave as it does on hardware.

dyncom: Handle modifying the APSR via an MRC instruction