Initial draft of design section of report

closes #25 

@snorberhuis 
The bullshit alarm went off. There is offcourse some truth in the statements. I think this is way overboard and there are loopholes in the reasoning. For example the jobs will only not be completed if the termination is non pre-emptive.

I propose to change it to:
Secondly, the provisioning schemes can easily result in oscilliation, where a set of nodes is constantly being created and terminated. 

We chose a more simple, conservative scheme to prevent these troubles. When the system is up and running in production data can be gathered from the production environment and analysed for a more suitable schema.