Start deprecating all the "right" naming in the library

[Travis Reeder]

As you probably know, this aws library that we're maintaining is a fork of RightAws library from RightScale, but it's changing enough now that I think we should start moving it into it's own namespace/module of just 'Aws'.

We'll keep the 'right' names in there for backwards compatibility for a while, but start to phase it out.

Changes would include:

- require 'aws' instead of require 'right_aws'

- Aws::EC2/Sdb/S3/etc instead of RightAws::X 

Thoughts?