Cloud files v1

Rackspace Cloud Files v1 support. Issue #216 

- [x] Openstack Delegation
  - [X] Functions
  - [X] Unit tests
  - [x] Acceptance tests
- [x] CDN
  - [x] Functions
  - [x] Unit tests
  - [x] Acceptance tests
- [x] Bulk
  - [x] Delete
Here we have to acquire a network ID that may or may not exist. *sigh* Cross-service acceptance tests for the win