Added: Support for alternative cron files ( Servers::cron::cron )
Added: Support for plural translations
Changed: Translation is now processed using Zend_Translate (which is thread-safe) and Zend_Cache
Fixed: Plugins must be translatable  using the tr() core translation function
Removed php-gettext library
Small fixes
(cherry picked from commit 642070a)
(cherry picked from commit 096ed20)