Coordinated testing

sch-rnd is being built up from scratch. This means it's very far from 
being useful: only a few features are implemented yet. I have a roadmap 
for what I am going to implement in roughly what order, as features have a 
dependency tree. 

For testing this means:

- just randomly doing actions in general won't get us far because you'd 
only find 99% of what you try is not yet implemented

- or even worse: you couldn't tell whether it's a bug or just not 
implemented

- focus is key: focusing testing on what I am working on at the 
moment and reporting bugs there is what makes this kind of testing useful

- making feature requests about parts that are far away from what I am 
working is only distraction


I will write "test req" mails from time to time. Please try to focus 
testing on the topics I explicitly mention in the current and/or past test 
reqs, to make your time spent on testing most useful for the project!