sdl_mixer: Changelog

Version Message
0.4.0 - Fix SDL extension dependency (remicollet)
- Add workaround for Mix_HasMusicDecoder where not available (remicollet)
- Properly init/quit sdl_mixer library (remicollet)
- Improve phpinfo with Mix_Init supported flags (remicollet)
- Add missing 'src' build directory in config.m4 (kea)
0.3.0 - Fix wrong file added to pecl package
0.2.0 - Initial release