We can now press Ctrl+C remotely while any subprocess of the bootstrapping process is running,
previously SIGINTs weren't propagated to the bootstrapping process because there was a thread
in between it all. Now the bootstrapping process is in it's own process group.
The work consists of three parts:
* Allow for bootstrapping remotely,
this makes it possible to run the tests
on e.g. OSX with VirtualBox installed
* Make bootstrapping a fully automated process
where the manifests can be generated by the tests
and the tests can call the bootstrapper directly in python
* Create a framework wherein instances can be booted up
using the bootstrapped images and subsequently tested
