Only allow manually setting focus to the rendering widget when in Single Window mode. Apply this behavior to when changing the mode while an app is running.

By default widgets are set to the focus policy Qt::NoFocus which disallows manually focusing it. Changing the policy to allow clicking the widget to set focus to it allows for keyboard input when not rendering to a popout window. This commit also sets focus to the widget when showing it.

Fixes issue #158.

Stubbed IsSdmcWriteable to always return writeable.

armemu: Correctly set the Q flag for a bunch of ops.

They were setting the old S flag.

armemu: Fix retrieval of the CPSR in MRS instructions.

armemu: Emulate the GE and Q flags.

Needs to use the updated state of the CPSR.

Clean up CMake library specification

dyncom: Move over QADD16/QASX/QSAX/QSUB16

More warning cleanups

CMake: Turn MSVC optimizations up to 11

dyncom: Move SEL over

CFG: Implemented the GetConfigInfoBlk2 function.

dyncom: Move over SASX/SSAX/SADD16/SSUB16

Hopefully this will make people stop thinking it's a hard dependency.

While not having a noticeable effect on CPU-bound applications, this
change gives an about 30-50% increase in performance for games using
the GPU.

Moved most of the shared CFG code there, implemented a few CFG:I functions