Update CHANGES for 1.2 release.

I didn't list all the trac tickets; that's what the repository
commit log is for. I prefer CHANGES just list the major highlights.


git-svn-id: http://svn.xiph.org/trunk/ao@19075 0101bb08-14d6-0310-b084-bc0e0c8e3800

CHANGES

-1.1.1 - Not yet released
+1.2.0 - January 27, 2014
  - Added missing ao_file_extension() (see Trac #1841)
  - Fixed memory leak in ao_shutdown() (see Trac #1799)
  - Updated manpage libao.conf.5 (see Trac #1822)
  - Corrected doc/ao_play.html (see Trac #1808)
+ - Latency adjustments
+ - Implement PulseAudio client_name (see Trac #1924)
+ - Other ALSA, Pulse, Roar, sndio and MacOS driver improvements
 
 1.1.0 - February 21, 2011
  - Add autofoo ld symbol versioning to build system