HTTP API should accept responses in the 200 range rather than only 200
Fix mixed indentation
Use (200 <= reply.code < 300) instead of a regex for testing that the response code is in the 200 range
Add optional code to DummyIm.request_succeeds() for http api, and factor it into the tests
Add missing semicolons
Better defaulting for DummyIm.request_succeed in http api tests
Merge branch 'feature/issue-34-http-api-should-accept-responses-in-the-200-range-rather-than-only-200' into develop