Create an Openstack Compute client.
Use ServiceClient and pagination in Flavor operations.
Ditto for Images.

I'm guessing that the images service also uses marker-and-limit pagination. I'll have to
check when I'm less :airplane:.
Use clients and pagination for Servers, too.

Whew.
Rename ListResult(s) to ListPage.
The server test passes again.
Implement images.Get(). Image tests now pass.
Move compute acceptance tests into a v2 folder.

Consistency!
Rework the compute acceptance tests.
Clarify which statuses are reached at which points.
Merge remote-tracking branch 'upstream/v0.2.0' into paginate-compute

Conflicts:
	openstack/client.go
Unit test flavors.List().
Add flavors_links to the List result.
Add a flavors.Get test.
images.List test case.
Test images.Get.
Test servers.List.
Server creation test.
Server deletion test.
Test the Get call.