- A small fix for non-colour mode.
- Updated "usage" message.


git-svn-id: https://svn.tdr.iem.uni-due.de:8443/svn/sctp-misc/trunk/subnetcalc@1901 acdd8558-d4fd-0310-b0a5-8cf3c1ec824a
Updated ChangeLog.


git-svn-id: https://svn.tdr.iem.uni-due.de:8443/svn/sctp-misc/trunk/subnetcalc@1902 acdd8558-d4fd-0310-b0a5-8cf3c1ec824a