Hopefully re-greening the build.
Add a plugin to handle sending notifications to Slack (https://slack.com/)

Closes #720
Logarithmic vertical scale for charts

Since we have one diagram for multiple results, we may have PHPCS result giving 12000 errors, while PHPUnit gives 200 tests, and 1 failed test.. those numbers and their variation won't be very visible, unless we use logarithmic scale

Closes #686
Cleanup of the disabled login mode.

Hides user menu, the navigation user panel, etc.

Closes #718
Merge remote-tracking branch 'upstream/master'