Log Message:
Update to 0.3.0. Adapt license.

Changes in 0.3.0
----------------

* added replay_gain_mode and replay_gain_status commands
* added mixrampdb and mixrampdelay commands
* added findadd and rescan commands
* added decoders command
* changed license to LGPL
* added sticker commands
* correctly handle errors in command lists (fixes a longstanding bug)
* raise IteratingError instead of breaking horribly when called wrong
* added fileno() to export socket FD (for polling with select et al.)
* asynchronous API (use send_<cmd> to queue, fetch_<cmd> to retrieve)
* support for connecting to unix domain sockets
* added consume and single commands
* added idle and noidle commands
* added listplaylists command

Changes in 0.2.1
----------------

* connect() no longer broken on Windows