Laniakea

<h4>Improvements</h4>

* Add an asynchronous API for spot instance creation
* Add PyPI deployment configuration for Travis CI
* Run tests in Travis CI with pytest


<h4>Bug fixes</h4>

* Fix bug in create_spot: reversed doesn't work on iterables

<h4>Kudos</h4>
Jesse Schwartzentruber

Gary Kwong

<h4>Features</h4>

* Create on-demand and spot instances on AWS
* Use cloud-init user-data scripts for provisioning
* Support importing user-data scripts into other user-data scripts
* Support user-data macros
* Support tags for instances
* Support terminating and stopping of instances
* Support custom AMI profiles
* Add Python 2 and 3 compatibility