I redefined the license of xmantaray, it is now GPL 2 or later and APSL 2.0 (Apple open source license). I've changed some things and working on version 0.9+ at http://erana.yellowcouch.org/cplusplus/ together with an update to guile 1.8 for my flyer shootemup game '42 at http://erana.yellowcouch.org/cplusplus/