Added django.js which implements the following modes

  - django (text/x-django)
  - django:inner

Closes #2381

And style them differently from unknown properties.

Issue #2356

Issue #2373

Closes #2374

Add tests. Adjust addons that depended on previous token structure.

Also improve indentation around implicit end tags in HTML.

Issue #2176
Issue #2333

Issue #2352

It was broken and confused.

Make the mode register a list of completable words instead.

Issue #2324

Issue #2304

Closes #2275

Closes #2274

Closes #2272

Also configure the htmlmixed option to pass through xml-mode-specific
options to its inner xml mode.

Issue #2265

(removed non-octave ... comments, added octave's # comments)

Closes #2262

relates to https://github.com/marijnh/CodeMirror/issues/314

relates to https://github.com/marijnh/CodeMirror/issues/314

Closes #2075

Mode dependencies are now loaded in a saner way.

So that it doesn't error when inner modes are missing.

Issue #2224

Issue #2223

So that the default mode when this is loaded first is actually a
working mode.

Also: indent the file to correspond to the rest of the codebase.

Closes #2223

Issue #2221

and `formatting-header4` -> `formatting-header-4` for consistency.