* Don't maintain similar overview in README.rst and docs/index.rst -- instead just include relevant portions of readme in the docs
* Patch up README version numbers and doc links in setup.py long_description to freeze them to the version being setup
* Suppress the Travis build status indicator in the docs and PyPI, since it can't be frozen to the specific version in question
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.)
* Release notes in readme
* Update example in readme
* Note deprecation of DjrillMessage class
* Longer long_description for PyPI
* Update authors
* Bump version number (setup.py and __init__.py)
* Don't crash if no tags
* Allow `None` to omit options entirely from Mandrill send call
* Default `preserve_recipients` to None (= use setting from Mandrill account)
* ImproperlyConfigured --> ValueError for bad tags
* Supports additional Mandrill send-API attributes on any ``EmailMessage``-derived object -- see details in readme
* Removes need for MANDRILL_API_URL in settings (since this is tightly tied to the code)
* Removes ``DjrillMessage`` from the readme (but not the code or tests) -- its functionality is now duplicated or exceeded by standard EmailMessage with additional attributes
* Ensures send(fail_silently=True) works as expected
