1.0.0-beta.4

Added

• Add i18n tooling to export strings to Crowdin, retrieve and compile translations, for the
  frontend and the backend. All translations are committed inside the project,
• Add links to switch language from the menu,
• Add social network badges in the footer, on course pages and on blog posts,
• Make categories configurable via the CMS, multi-dimensional and nested,
• Add blog post pages in a section called News,
• Update Elasticsearch indexes each time a page is modified and published,
• Improve fulltext search to match partial words,
• Add end-to-end tests for the search functionality to secure behavior.

Changed

• Make site look generic and deploy it to richie.education,
• Build frontend in production mode,
• Upgrade to Python 3.7,
• Switch to indexing courses instead of course runs,
• Allow course run dates to be null. If a start date is null, the course run is
  to be programmed, if an end date is null, the course run (or its enrollment) is deemed to
  last forever,
• Use our own Elasticsearch image to allow running it with a non-root user,
• Move persons to the courses app,
• Rename database tables to richie_* to regain control of their name,
• Improve structure and packaging to allow using Richie as a third party application in another
  DjangoCMS project,
• Many cosmetic and UI fixes and improvements following first user feedbacks.