Automatic Updates

[msander]

There have been many changes In the current develop-branch.
I think especially the complete new syntax of the rules, break our Auto-Updates for the upcoming release. (Except anyone is willing to implement a rule-converter)

Several projects have shown that the feature-set is already very good and fits most use-cases well. For the future we will focus on improving stability, performance and usability. This will probably only have minimal model changes and writing migrations should get a lot easier.

Nevertheless, for versions > 0.2 we should find a way to automate tests of the database migrations to provide upgrades on a more regular and safe level.