Clean XSS in Wiki Content

This release prevents the XSS in the Wiki Content

fix i18n issue

Used trimmed in blocktrans to remove newline and endline from strings.

GDPR retirement methods

Methods to retire PII.

Fix deprecated Markdown extension initialization

Stop triggering warnings due to using a deprecated form of extension initialization that was deprecated in Markdown 2.6.

Bump version to 0.0.16

Last release was done without bumping the setup.py version, this release corrects that and gets it back in sync.

Further pin Django version to <2

Merge pull request #30 from edx/bmedx/fix_pinned_django_version

Fix pinned version of Django to be <2

Migrations cleanup

Separated migrations for the attachment and image plugin models from the main app's migrations. This drops the existing tables in the process, but we have nothing beyond test data in them and this gets us much closer to how upstream chose to arrange their migrations. Fixed now in order to address a test order dependence problem in edx-platform when makemigrations output is verified.

Updates for Django 1.11.

Changes that are compatible with both 1.8 and 1.11. Manual testing was done, as there are no automated tests.

a11y fixes

Fairly minor a11y fixes.

v0.0.9 (2016-08-24)

Merge pull request #22 from open-craft/mtyaka/increase-slug-size

Increase slug max size