Merge pull request #12 from awslabs/develop

Pull release 0.0.11 from develop
Merge pull request #13 from awslabs/develop

Fixing update version check
Merge branch 'master' of github.com:awslabs/cfncluster
Updating AMI mapping to support multple Base OS
Revert "Updating AMI mapping to support multple Base OS"

This reverts commit ef7b64129fec3a5b7e457203e04d84a8a56745d6.
Merge pull request #14 from awslabs/develop

Develop merge for v0.0.12 release
Merge branch 'master' of github.com:awslabs/cfncluster
Merge pull request #16 from awslabs/develop

Pulling v0.0.13
Merge branch 'master' of github.com:awslabs/cfncluster
allow [+.@] in KeyName
Merge pull request #17 from jwm/master

Please allow more characters in KeyName
Merge branch 'master' of github.com:awslabs/cfncluster