Updated the GS classes to use new-style classes as well.
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Support for multiple credential profiles.
This fixes a handful of documentation mistakes
Merge remote-tracking branch 'gene1wood/documentation-fixes' into develop

Fixes #1980
Fixing SQS tutorial to correctly describe behavior of the write operation.  Fixes #1985.
Merge pull request #1986 from garnaat/fix-1985

Fixing SQS tutorial to correctly describe behavior of the write operation
Merge remote-tracking branch 'zachm/add_profile_credentials_config' into develop
Fixes #1979.
Updated conn params for security_token.
Return the x-amz-restore header with GET KEY and fix provider prefix.

Currently x-amz-restore is only supported by HEAD KEY but GET KEY also
returns the header when it has been successfully restored and the
restored key is awaiting expiry. Fixed the provider 'x-amz-' prefix
part so that it's consistent with other standard headers. Previously,
it was hardcoded.

This patch is hard to automate a test for as transitioning to GLACIER
and restoring back from GLACIER both take time. This change has been
manually tested.
Added a fix for anonymous S3 requests.

The added ``time.sleep`` is needed in the tests to let the ACL take effect. Without it, the test consistently fails for me.
Add support for configuring SNS and SQS endpoints through boto.cfg
Fixes #1991.
Added a missed import.
Added tests around opting-in on SigV4 for S3.
Throw an exception if using SigV4 w/o a host.
Extracted the common config altering bits.
Fix LIST MULTIPART UPLOADS api by re-adding delimiter and prefix params.

This has been broken since the below commit added validation of kwargs

   commit bace7b66c999873cd5d23a54cd9570f912e89b93
   Author: Daniel G. Taylor <danielgtaylor@gmail.com>
   Date:   Fri Oct 25 11:22:20 2013 -0700

       Validate S3 method kwarg names to prevent misspelling. Fixes #1782.
Add a unit test with delimiter and prefix handling.
Only pull name tags for extant instances
Fix boto import for invocations without a region