Merge pull request #59 from lehitoskin/master

Place Racket wrapper in separate ebuild
[dev-scheme/libtoxcore-racket] fix version (#60)
[net-im/qtox] Add dependencies for qTox global auto-away

Currently only Xorg is supported by qTox.

Dependencies:
* x11-libs/libX11
* x11-libs/libXScrnSaver
Epatch_user, etc.
[net-im/qtox] Make deps on X11 stuff optional
Update README.md; adding qt overlay is no longer needed
Patch for config.rkt now updated