Modern versions of Django distrust template tag output by default,

requiring instead that they mark their content as safe. This reduces the

chance of security problems from template tags that aren't intended to

produce HTML content.
To provide compatibility with both Django 1.6 and 1.11, we now mark

rendered content from all template tags as safe. Template tags that call

out to other render functions rely on the safety of those functions, so

there may still be some that need to be fixed in future changes.

Unit tests pass.