Mainly the same functionality but some minor detail changes (add button in title, order by and show latest change, no author highjacking)

Other changes:

• Refactored user notifications (save to session and display) to be flexible
• Refactored logger to include the currently logged in user (if any)
• Show 404 on ModelNotFoundException to allow Model::findOrFail($id)
• The dd() and dump() functions can now be used in template files
• Sadly the "smilies" got lost but hey, there is UTF-8 and maybe we can add some more proper handling for it later (like replacing :tada: with 🎉 if we support markdown instead of / in addition to html)
• Removed LegacyUrlGenerator (broke a while ago in a merge commit...)
• Redirector now uses URLs instead of relative paths (using the optionally configured application base url)