add missing variable initialisation to AgaviGettextTranslator
closes #968
Use arbitrary timezone offset from datetime object when available in AgaviTranslationManager::createCalendar()
closes #957
merge f3304e38e368637b7c6216986ebc4d4f05255e63...d3f59d79429a5b843aad80089369a12d7dd9d10e (from 0.11)