library updates and checkmate vol.3!

library updated today
* SION sound library
 version: 0.5.6 to 0.5.7
 see: http://www.libspark.org/wiki/keim/SiON_e

* UNION multiuser application platform
 version: alpha3 to alpha4
 see release notes at: http://www.unionplatform.com/?page_id=729


And checkmate event vol.3 has started!
see http://checkmate.wonderfl.net/