[ctioga2] fix small typo

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@487 86c91514-0d3b-42e0-aed1-4dfce116d947
[ctioga2] a clear-axes command to remove all axes in one go

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@488 86c91514-0d3b-42e0-aed1-4dfce116d947