Updated project.

I am currently working with Spoofax for my master thesis and though it would be a good training to get this project working again. Does anyone use this plugin? I am not sure if I would, but at the moment I find it interesting to play with it in my spare time.

In this pull request  I copied all relevant files into a freshly created Spoofax project and adapted the files where necessary. Otherwise I have done no changes. The project compiles now for me and nix files are parsed correctly.