[ctioga2] update gem file

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@438 86c91514-0d3b-42e0-aed1-4dfce116d947
[ctioga2] really update the gem file with the latest version !

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@443 86c91514-0d3b-42e0-aed1-4dfce116d947