Updated the documentation.

[UrsZeidler]

As the we move on with the implementation the documentation get outdated.
This is the main issue.

[NoxMortem]

Possibly add a task list to this issue, this would help contributors to find out where to start updating the wiki.

As suggested in #107 I think it would be a good idea to add a walkthrough for an example project. This would provide a more compact but incomplete documentation, but it would help new users.