* Add some context to exceptions on unserializable
values (addresses #89).
* Document need to format merge data
(into something JSON-serializable).
* Add RemovedInDjrill2 DeprecationWarning.
* Deprecate blanket date/datetime serialization.
* Django 1.8 requires TEMPLATES setting (for admin tests)
* Ignore cycle tag deprecation warnings
One remaining PendingDeprecationWarning: "the imp module is
deprecated in favour of importlib" is coming from six, and has a fix
waiting to land: https://bitbucket.org/gutworth/six/issue/112
Closes#82.
* Test mock API responses (with actual content) in admin tests.
(This exposes failure case, at least under Python 3.4/Django 1.6.)
* Parse json from Response.text, rather than raw Response.content
bytes, in admin views.
(Improves testing accuracy around API response encoding.)
* Add `six` as test dependency (six.BytesIO, six.b)
* Change MockResponse content to bytes (because HTTP responses
are bytes, not strings)
Second attempt to address possible test sequencing issue around tests that alter settings. (Failures in Travis tests not reproducible locally.)
Back-ports override_settings from Django 1.4 for compatibility with Django 1.3.
Treat image attachments with a Content-ID header as embedded, rather than ordinary attachments. (Rationale is that you must set the content-id to be able to refer to the image within your html, so that's a reasonable indicator to handle it as embedded.)
Introduce djrill.NotSupportedByMandrillError for unsupported functionality (previously used generic ValueError).
Change to djrill.MandrillAPIError, derived from requests.HTTPError, for API error responses (previously used djrill.mail.backends.djrill.DjrillBackendHTTPError -- retained as equivalent for backwards compatibility).
Add test cases for send-template.
Expand template_content dict into Mandrill's name/value array.
Don't send template_content as "None" if missing.
Clean up some variable names in the backend.
Add DjrillBackendMockAPITestCase.assert_mandrill_called; use it in representative backend test cases.
(Also make get_api_call_data work with various ways of calling requests.post.)
