Interpreter: fix carry calculation in srawx

I don't know anything this affected, but it didn't match the manual (or JIT).
Add hotkeys to select save state slots and to save/load the currently selected slots.
JIT: use cvtsi2ss in paired singles

One less instruction for a few of the loads.
JIT: simpler fallback conditions for load/store float

I wasn't really thinking when I wrote these; d/s are for float registers, not
gprs.
JIT: rename a few constants to be more accurate

Remove the '2'; it's not longer applicable.
JIT: implement remaining psq_l/st instruction variants

These are used in at least a few popular games, including Super Smash Bros.
Brawl.
JIT: fix regression in ps_sel

My code didn't maintain correct semantics with floating-point NaNs (a < b is
not the same as "not a >= b" in float), which seems to have broken FIFA 12.
Merge pull request #1105 from FioraAeterna/pssel

JIT: fix regression in ps_sel
JIT: fix debug mode
Debugger: make opcode search a bit better

Search a wider range (not all games fit in the originally searched range).
Print a notice if the opcode isn't found, instead of silently failing.
Debugger: scroll by multiples of 4 bytes

Avoids that weird effect where scrolling offsets code from 4-byte boundaries,
showing nonsense 75% of the time.
Merge pull request #1086 from FioraAeterna/fixsrawint

Interpreter: fix carry calculation in srawx
Merge pull request #1098 from FioraAeterna/cvtsi2ss

JIT: use cvtsi2ss in paired singles
Merge pull request #1108 from FioraAeterna/fixdebugscroll

Debugger: scroll by multiples of 4 bytes
DolphinWX: Fix GC/Wiimote input windows randomly crashing on OSX
Fix and simplify GCPad::SetMotor()

abs() takes an int argument. Casting -0.5..0.5 to int always resulted in
zero.
Add AArch64 emitter aliases for MOV and MVN.
Fix AArch64 JIT compiling.
Reset RSP after calling Jit in case it cleared the code cache.
windows/qt: add (hopefully) all plugins DolphinQt should possibly need.

For now they are all copied to binary directory, once the project is more mature
it can be stripped down.