[Imported lab1.
bringert@cs.chalmers.se**20051007233446] 
[Fixed some readme typos.
bringert@cs.chalmers.se**20051007233741] 
[Some code clean-up and generalization.
bringert@cs.chalmers.se**20051007234305] 
[Removed superfluous comments.
bringert@cs.chalmers.se**20051007234443]