Document how to configure compressed output for the Distribution Behavior

[skyzyx]

Update: Discovered that the compress key is supported, just not documented. Updated the ticket description to refer to updating the documentation (alone) as opposed to implementing the feature and updating the documentation together.

https://github.com/Droplr/serverless-api-cloudfront/blob/master/index.js#L158-L160

Original ticket contents are below:

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I would love to be able to specify which methods are allowed for my distribution. It would be wonderful if this were configurable via this plugin.

See:

• Compress