working on hide-region.el for number blocks

git-svn-id: http://ansys-mode.googlecode.com/svn/trunk@679 d5a51148-9f23-0410-882a-37b6fa6ce781
one the way to hide-number-blocks

git-svn-id: http://ansys-mode.googlecode.com/svn/trunk@680 d5a51148-9f23-0410-882a-37b6fa6ce781