Google Code-in

Problem

It's already possible to sign up to Tracker via OAuth. However, it's not that clear, since the link is only in "login" dialog, not in "sign up dialog".  

Proposed solution

Add "Register via Meta Wiki" button to the register dialog.   Student is expected to send a patch for wikimedia-cz/tracker repository, hosted at Wikimedia Gerrit. When claiming task on GCI website, student should claim a respective Phabricator task as well.  

Materials

• Tracker in production
• Test Tracker version - you can play with Tracker freely here
• [Codebase](https://gerrit.wikimedia.org/r/admin/projects/wikimedia-cz/