Fix FAQ Link in Readme

Remove unused imports in game_list_p.h

Display QMessageBox Dialogs For Errors

 - Deleted GetStatus() because it wasn't used anywhere outside of Core::System.
 - Fixed design flaw where the message bar status could be set despite the game being stopped.

Optimized messages that were repetitive and added ability for core errors to specify more details optionally.

- Made LoadKernelSystemMode return a pair consisting of a system mode and a result code (Could use review).
- Deleted ErrorOpenGL error code in favor of just having ErrorVideoCore.
- Made dialog messages more clear.
- Compared archive ID in fs_user.cpp to ArchiveIdCode::NCCH as opposed to hex magic.
- Cleaned up some other stuff.

CAM: use IPCHelper

Split-up kernel.h

swrasterizer: implemented TextureCube

Now that HandleTable doesn't directly depend on WaitObject anymore, this
can be separated from the main kernel.h header.

CMake: Use CMake target properties for all libraries

This isn't necessary anymore since plain Get works correctly for
WaitObjects.

OpenGL: Improve accuracy of quaternion interpolation

Dependencies and build system cleanup

Separates the file into sections and re-orders things to fit in them

Dynarmic already adds the correct include paths to the library target.

This used to be required to support both Qt4 and Qt5, but we dropped Qt4
so it's not needed anymore.