Improve CMS Exception handler.
Previously Twig syntax errors inside a component partial would show the incorrect file and line number. This is fixed.
Also simplified the approach so the stack trace is not hidden inside a closure.
Commented out the refresh button, the usage is not 100% clear and can cause destructive damage.
Fixed the unknown component caching problem. Added the unknown component handling to the back-end. AJAX request can now be stopped with preventing default action in the oc.beforeRequest event. Fixes #46.
Create a System Twig extension, for shared features
Minor text updates
Fixes #55 - Assets are now referenced correctly as Assets instead of URLs
Implemented the content tabs style, minor fixes in the back-end styling.