[ctioga2] prepare for release 0.6

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@498 86c91514-0d3b-42e0-aed1-4dfce116d947
[ctioga2] a script to help with releasing ctioga2

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@500 86c91514-0d3b-42e0-aed1-4dfce116d947