Openstack swift blobstore

This adds support for openstack-swift grizzly BlobStore.

Once this is in, we can start working on JCLOUDS-299: Multi-Region Support for BlobStore

Note:  the live tests will fail a couple items on either HPCS or RAX, depending on what's unsupported on that cloud.  Usually, this is related to either signing or public container acls.

Once this is in, we can create subprojects to address the vendor specifics, like we do now.