Step or Manhatten Connection Lines

[BrettHesterLP]

First wireit is greatness! but wondered support for manhatten or step connection lines instead of bezier curves or straight lines. See draw2d's library for example... http://www.draw2d.org/draw2d/examples_short?page=1

[ericabouaf]

Here is my first attempt : http://github.com/neyric/wireit/commit/2e4ff652908afbfe908c9e2ad9147ca270a825f6

But the algorithm to draw those wires is not trivial :( It needs some work there...