Cleaned whitespace mess-ups as mentioned

Corrected typo CUATION to CAUTION in access.php:59

Removed the manual translations in l10n/de/settings.po: 307
and l10n/de_DE/settings.po:312

Rolled back .htaccess file to the one I got when I forked the oC core.

All changes mentioned by @Kondou-ger. 
Thank you for reviewing it.