Merge pull request #11 from JDong-rmn/master

Fixed minor typo in README sample code.
Implemented Launcher for Instances.
Merge pull request #15 from JDong-rmn/KeyPairCollection

Implemented get, create, and destroy methods on acky.ec2.KeyPairCollection.
Added comment for clarity.
Forgot to run pylint, fixed.
Merge branch 'master' of github.com:JDong-rmn/acky into EOPS-5773