[henshin-dev] update 0.5.1

[Christian Krause <henshin.ck@xxxxxxxxx>]

Hi,
I compiled a new integration build: version 0.5.1.I201003091626. There 
is a link in the download section, but it takes a day or so until it's 
mirrored to the download servers. The new version includes improvements 
in the graphical editor, including support for multiple NACs. In the 
example plugin there is code that exemplifies how to do model evolution 
with Henshin.

Ciao,
Christian