Update changelog for 1.1.1 release.
Update changelog for 1.1.1 release.

svn path=/trunk/vorbis/; revision=9501

eidy/vorbis,emscripten-ports/Vorbis,erikd/vorbis,eidy/vorbis,ShiftMediaProject/vorbis,erikd/vorbis,emscripten-ports/Vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,youfearm3/vorbis,mwgoldsmith/vorbis,youfearm3/vorbis,mwgoldsmith/vorbis,felipebetancur/vorbis,felipebetancur/vorbis,ksophocleous/vorbis,ksophocleous/vorbis,nicolaichuk/vorbis,ShiftMediaProject/vorbis,emscripten-ports/Vorbis,nicolaichuk/vorbis,mwgoldsmith/vorbis,youfearm3/vorbis,erikd/vorbis,eidy/vorbis,ShiftMediaProject/vorbis,nicolaichuk/vorbis,felipebetancur/vorbis,ksophocleous/vorbis,nicolaichuk/vorbis,youfearm3/vorbis,erikd/vorbis,ShiftMediaProject/vorbis,mwgoldsmith/vorbis,ksophocleous/vorbis,emscripten-ports/Vorbis,felipebetancur/vorbis,eidy/vorbis