Awstools

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- ec2ssh: add instance private hostname matching
- Move autoscale subcommands to a new cfnas command
- ec2ssh: add bash completion helpers
- Pylint

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- cfn batch-update: continue after a failure if user wants to

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- Add --force option to `cfn update` command
- Add a `cfn batch-update` command

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- Complete hgignore
- ec2ssh: enhance fallback when denying connection to multiple instances
- Fix wrong current_capacity displayed in autoscale update utility

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- fix *cfn setcapacity* setting 0 instead of the desired value

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- start using zest.releaser for versioning