Remove 'switch' from the database
Fix minor errors in switch removal
Merge branch 'devel' into no-switches
added list_headnode_images query call
fixed syntax error in tests/unit/api.py, and added cfg section for
headnode in test-common
Merge branch 'devel' into headnode_img_query

Conflicts:
	haas/test_common.py
added base-headnode to config options in test-common and changed api test to
reflect
Merge pull request #295 from lokI8/headnode_img_query

added list_headnode_images query call
Merge pull request #293 from gsilvis/no-switches

Remove 'switch' from the database
Implement null auth backend

Authentication/authorization backends belong in haas/auth_mechanisms .  It's
possible that the API of that plugin will have to be expanded to cover what
the CLI needs to do.