Merge pull request #11 from JDong-rmn/master

Fixed minor typo in README sample code.
Implemented get, create, and destroy methods on acky.ec2.KeyPairCollection.
Edited documentation.
Implemented instance launcher for acky.ec2.InstanceCollection.
Created tests for AwsCollection and AwsApiClient
removed debugging artifact
Changed README to markdown, added build-status image.
Merge branch 'master' of github.com:JDong-rmn/acky into sphinx