abstract away from AWS EC2 towards something like libcloud

[akobler]

Hi

First of all, thanks a lot for the great software. I was just wondering if you have been already thinking about not only support EC2 but also other cloud service providers? How much work do you estimate to adapt starcluster using an abstraction layer like libcloud [1] instead using directly boto/EC2?

Best, Andi

[1] https://libcloud.apache.org/