Some repoman fixes

I discovered your overlay while planning my own for a couple of these ebuilds. Figured it can't harm anything to contribute to your overlay instead of duplicating effort. If it's okay with you I may send occasional pull requests to make things adhere better to the official portage tree guidelines.

* Fix invalid manifest for istatd
* Create layout.conf
* Delete media-gfx because no valid ebuilds were contained within
* Replace spaces xbmc ebuild with tabs
* Update qingy to use virtual/pkgconfig
* Fix mixed tabs and spaces in libshairport & libshairplay