Update checker: Hide the revision number if it's 0 for consistency.
LAV Filters: Use out-of-source-tree builds for FFmpeg.

This way x86 and x64 compiled objects can coexist peacefully.
Internal LAVVideo: HW Acceleration wasn't correctly turned off on XP when none was detected.
player.html: remove width completely.

It's handled in JS.
Enable per-monitor DPI-aware on Windows 8.1.

Fixes #3356.
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 Unrar to unrarsrc-5.0.12.tar.gz.
Update Changelog.txt.
Mention Windows 8.1 in the docs.
Update Readme.txt.
cosmetics
Use the proper size prefix in format functions.
Be consistent with the var type.