Specify alphacolorref as highp
Unbreak things (silly mistake in last commit, remove *2.0 factor which just can't be right)
Reduce default volume.
Apply JPCSP's fix that allows some audio to play in Monster Hunter. Far from perfect though.
Revert c8431493be
Merge pull request #2663 from raven02/patch-6

Revert c843149 that causes artifact in non-buffered rendering mode in some games
Add rapid fire ctrl interface, minor cleanup.
Properly send the right analog to the game.

I don't think this was actually working before.
Add keymap support for alt/shift/ctrl on Windows.

WM_KEYDOWN only gets VK_SHIFT, not L or R.  We could detect which on
press, but not on release.  It's simpler to just resend both.
Add a rapid fire virtual key, like before.
Make it easier to test the pause button.
Make pause/speed virtual buttons work again.

Fixes #2669.