GNOME UPnP/DLNA services - plugin development files

 Rygel is a collection of DLNA (UPnP AV) services (devices in UPnP speak),
 implemented through a plug-in mechanism. Important facts and features:
   * APIs to ease the implementation of AV devices (currently only
     MediaServer V 2.0 specification).
   * Audio and Video Transcoding: source format could be anything
     GStreamer's decodebin2 can handle but output formats are currently
     limited to: mp3, PCM and MPEG TS. Fortunately the transcoding
     framework is flexible enough to easily add more transcoding targets.
   * Specifically designed for GNOME (Mobile).
   * Based on GUPnP.
   * Written (mostly) in Vala language.
 .
 This package privdes the files needed to build Rygel plugins.