Move S3 object toGlacier

[switchtrue]

S3 lifecycle policies support the ability to move an object to glacier after a certain amount of time. It would be good if Frosty could manage this via the frosty.config.

Note: This is still currently possible if you set up the bucket in S3 manually and then don't include any lifecycle config in the frosty.config file. With no lifecycle policy in the config Frosty just uses whatever is already pre-configured in AWS.