libshout-2.3.1 release with Opus support

All,

I've made a new release of libshout. Greg Maxwell contributed support
for the Opus audio codec (opus-codec.org). Tested with gstreamer and
oggfwd as source clients, and playback with Firefox Nightly and 'curl |
opusdec'. Thanks, Greg.

There are no other updates; in particular webm streaming still requires
the caller limit the send rate.

The source package is available:

 - http://downloads.xiph.org/releases/libshout/libshout-2.3.1.tar.gz

Checksums:

11765b2592e7ea623ccd93d3f8df172c  libshout-2.3.1.tar.gz
cf3c5f6b4a5e3fcfbe09fb7024aa88ad4099a9945f7cb037ec06bcee7a23926e
libshout-2.3.1.tar.gz

Enjoy,
 -r