Amper audio player for GNU/Linux and X11

[ketmar via Digitalmars-d-announce]

some updates:

* region.txt support for skins;
* reworked equalizer (smaller, faster);
* background scanner for playlist items (Amper won't hang when adding alot 
of files to playlist anymore);
* ID3v2 parser, so mp3s will have (some) metainfo too;
* fully configurable global hotkeys (including hotkeys for playback control);
* better on-the-fly skin reloading;
* pure X11 renderer, so Amper is using much less memory now.