Upgraded the AWS SDK to 1.6.1
Added support for HTTPS proxy and custom endpoint.

Added support for HTTPS proxying by passing a ClientConfiguration object
to the client constructors.

Added support for custom endpoints for elastic beanstalk (doesn't make a
difference for S3 since it's global) via the endpoint parameter.
Changed version to 1.2
Merge pull request #1 from Raniz85/proxy-and-endpoint

Proxy support and custom endpoints