RichardH : removing help pages
RichardH : dotted lines for vertical connectors
RichardH : implements and null arrows for horizontal connector
RichardH : implements and null arrows for vertical connector
RichardH : refactoring and tidying up code
RichardH : renamed fixture, removed some unused dependencies
RichardH : general refactoring
RichardH : refactoring connector factories
RichardH : removing menu bar, added tool box and help box instead
RichardH : added some text to help box