Model repository created

We are starting to migrate the models previously shipped with peekabot to a separate repository, which is hosted in our wiki. Not only does this slim the packages down quite a bit, it also lowers the threshold for third parties to contribute their own models (you need a Sourceforge account to edit the wiki).

In the upcoming 0.6 release, no models will be bundled with the peekabot package, aside from perhaps an example or two.