Lots of bug fixes and tweaks, including:
- Removing unused and broken PHP Copy/Paste Detector Plugin
- Email plugin localisation
- Cron job debug mode
- Improved Russian translations
- Webhook controller fix when sent an invalid project ID
- Adding Chinese language support
- Improved Polish translations
- Fixes for SVN webhook handling
- Update for Deployer plugin
- Switching source for PHP CS Fixer plugin
- Fix proc_open deadlock
- Handle Github private pull requests properly
- Enable support for PHP short tags in lint plugin