Merge branch 'release/4.2.0' into develop
closes #282, improves and hardens pagination
updates CakePHP to 2.5.4 #283
fixes "Neu Antwort" in german l10n email notification #279
fixes deleting category in admin backend fails #285
closes show postings in profile of ignored user #280
fixes creating new category in admin panel doesn't empty category cache #284
bumps version string
Merge branch 'release/4.2.1'