Internal filters: VP9 can now be enabled/disable from option page.
Internal filters: HEVC can now be enabled/disable from option page.
Remove logically dead code.

Fixes CID #965942 #1109592.
Fix uninitialized scalar variable.

Fixes CID #966220 #966223.
Fix an incorrect sizeof.

Fixes CID #966192.
Check return value.

Fixes CID #1109591, #1084350
Fix uninitialized class members.

Fixes CID #966364, #966344, #966315, #966315, #966347, #966319, #966314,
 #966313, #966280
Fix the /W4 C4245 warnings: signed/unsigned mismatch.
AppSettings: Move some backward compatibility code to UpdateSettings()
player.html: remove width completely.

It's handled in JS.
temp
Use ZeroMemory on more places instead of {0,0}
Fix NULL handle passed as parameter.
Update Git to 1.8.4.
Cleanup
cleanup
Update SoundTouch to 1.7.2 r173.
MPCTestAPIDlg.cpp: Check return value and add a cast to shut up /analyze.
Minor cosmetic changes.
common.props: Specify _WIN32_WINNT and _WIN32_IE too.