This uses more Cocoa classes to draw the lines, making it easier to
understand and hopefully maintain.
Furthermore, we use less memory now, which is nice, but all the
dynamic arrays probably mean more CPU usage.
This takes care of most situations. However, we don't have enough space
in the upperMapping to display multiple lines. Therefore we need to
improve it later on.
This is not complete and perhaps should not have been committed. However,
.xib files being what they are, rewriting history or merging is getting
very difficult so I'll just disable it for now.
If anyone wants to take a look at this: we should probably do some rev-parsing
to create a graph representation in ApplicationController. That class already
is a delegate for our table and can tell individual cells what to display.
There we should tell how many lines to draw, what color, if there are merges
or splitoffs etc.
Pieter de Bie