Now working on version 0.9.9.
Always publish to Amazon.

This is in preparation for the next patch that will allow you to specify
non-default memory and CPU options. This might pick another cloud.
But because amazon is currently the only one that allows us to stop a VM
rather than destroying it, it is better to stick with Amazon for now.
Allow specification of memory size for a VM.
Allow specification of number of CPUs.
Add "interactive" keyword for tasks.

This allows you to specify that a task must execute interactively
from the manifest, on a task by task basis.

This patch also refactors the way "quiet" and "debug" interact with
"interactive"

 debug -> always directly show output directly on the terminal
 quiet -> show output, either directly (if interactive), or when task is done
Add basic Mercurial support.

This doesn't parse .hgignore files yet, but will exclude the .hg
directory.
Fix ssh tests.
Version 0.9.9.