Remove 'update configuration' command.
Add a new command and clean up pep8 violations.

The new command allows for building AMIs using an EDP as a reference instead of
referring to the AMI directly.
Deal with cross deployment ami requests.

Since different deployments have different secret
repositories, we need to deal with what to do about
the configuration secure hash when the source and dest
deployments don't match.
Change the color of the warning to yellow.
Merge pull request #11 from edx/feanil/update_alton

Feanil/update alton