tweak global options

git-svn-id: http://protostuff.googlecode.com/svn/trunk@1604 3b38d51a-9144-11de-8ad7-8b2c2f1e2016
reference to config csv via leading _ (if it exists)

git-svn-id: http://protostuff.googlecode.com/svn/trunk@1605 3b38d51a-9144-11de-8ad7-8b2c2f1e2016