Honor jclouds.region with Swift blobstores
Honor jclouds.region with Swift blobstores

jclouds has inconsistent support for regions due to provider
differences.  AWS providers a single global namespace while Swift
scopes per-endpoint.  Tested with Rackspace Cloud Files in HKG and ORD
regions.  Fixes #81.

andrewgaul/s3proxy,timuralp/s3proxy,andrewgaul/s3proxy,kahing/s3proxy,kahing/s3proxy,timuralp/s3proxy