[ctioga2] extend a tidbit the format specification for tick labels

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@485 86c91514-0d3b-42e0-aed1-4dfce116d947
[ctioga2] a specific ticks command to change directly the look of ticks

git-svn-id: svn+ssh://rubyforge.org/var/svn/ctioga2/trunk/ctioga2@486 86c91514-0d3b-42e0-aed1-4dfce116d947