Windows: Update g_Config.ilanguage for ppsspp.ini [SystemParam] Language key

This key is important to be updated for multilang game.
Round texture bufw down to nearest 16 byte mult.
Update bufw handling in all gpus.

This fixes the softgpu as well, at least.
softgpu: small optimization, precompute tex info.
Merge pull request #3797 from unknownbrackets/texcache

Round texture bufw down to nearest 16 byte multiple
Merge pull request #3795 from kaienfr/Update_SYS_LANGUAGE

Windows: Update g_Config.ilanguage for ppsspp.ini [SystemParam] Language key
Add clearly missing parenthesis, see #3776.

Update contributors list.
Update native with ui crashfix by unknown
Fix dx9 so it builds on Windows (DOES NOT WORK.)
Merge pull request #3798 from unknownbrackets/dx9

Fix directx9 so it builds on Windows (but doesn't work)
Report the combination of bezier/spline + morph/skinning to see if it happens
Make the dx9 renderer working in headless mode
Merge branch 'master' of https://github.com/hrydgard/ppsspp into dx9windows

Conflicts:
	headless/Headless.vcxproj
Merge pull request #3799 from Ced2911/dx9windows

Make the dx9 renderer working in headless mode
GE_BLENDMODE_ABSDIFF : Replace it using GL_MAX
Merge pull request #3801 from raven02/patch-11

Better replacement mode for GE_BLENDMODE_ABSDIFF
[gpu] move GetIndexBounds to common
Merge pull request #3802 from Ced2911/gpu_c_fixes

[gpu] move GetIndexBounds to common
Buffer test output in headless a bit.

Just to newlines.  Cuts from profile by like 70%.

Seems like the bottleneck is Python, though...
Remove hack to skip messages from native.

Native is not so talkative anymore.