Use big endian definitions for ffmpeg PIX_FMT_* when running on big endian machines. Eg: PIX_FMT_RGB24 should become PIX_FMT_BGR24.

set volume-change variable also in volumeUp/volumeDown, because it seemed that when you change volume with that, it wasn't setted

better now, thanks for j-b for spotting.

The Windows only code doesn't exist yet, but soon ?

This is so that the net_* functions can use it without making pushing locking assumption on their caller.

macosx: added an option to automagically save the equalizer status and its settings (default enabled). Code cleanup.