4.1.0 includes breaking changes from 4.0.0

[nicolaschambrier]

In 4.1.0 a change has been made which is totally not backward-compatible:

• aws_access_key_id used to be an environment variable name while it's now expected to be the value
• same for aws_secret_access_key
• The descriptions for those two parameters did not change, it still says "... Set this to the name of the environment variable ..." which is incorrect

I think this version should be dropped and re-released as 5.0.0 (with updates to the description) as marking this as a minor change could break a lot of workflows, or at least fix the descriptions so that the public manual is correct.

[brivu]

Hey @nicolaschambrier, thanks for letting us know. I'm going to get a fix out for this today that should work if you have them stored as environment variables

[brivu]

This has been fixed with PR #159. I removed the $ and changed the way we expand that variable in the script and it works. Please let me know if you encounter something different. Thanks!