Use codemirror to highlight PHP syntax at /devel/php.
Merge pull request #158 from v3knet/at-ui/php-syntax-at-devel-php

New: Use codemirror to highlight PHP syntax at /devel/php
Use codemirror to highlight Twig syntax at /at/twig
Move /at/twig definition to at_ui module.
Merge pull request #159 from v3knet/at-ui/syntax-at-twig

Use codemirror to highlight Twig syntax at /at/twig
Left over e5ec6f31778b2846e9f4bb1afbdc3acc714d67e5
Fix wrong link to TravisCI report page.