The Spring Platform BOM has reached EOL, so we need to replace it for
future updates. This should not change any dependency versions.

https://spring.io/blog/2018/04/09/spring-io-platform-end-of-life-announcement

See GH-65.

* Update MathJax URL to use version 2.7.5
* Piwik was renamed to Matomo

Add support for OpenID Connect authentication

See merge request !118

Only OIDC providers that support configuration discovery are supported.

Google OIDC

See merge request !117

Google shuts down its Google+ Sign-In.

Add API endpoint to create copies of public pool sessions

See merge request !116

Fix import format

See merge request !115

Daniel Gerhardt authored 6 years ago and Daniel Gerhardt committed 6 years ago

The field of the inner class is kept for compatibilty reasons.

Delete inactive users

See merge request !102

Slighly refactored ControllerAdvices to include handling of Spring's
HTTP Exceptions. This fixes 500 status codes being sent instead of the
correct one.

Fixes GH-67.

Backport of d052fd73.