add missing variable initialisation to AgaviGettextTranslator
closes #885
Use arbitrary timezone offset from datetime object when available in AgaviTranslationManager::createCalendar()
closes #875
merge 00f6bc8ad98ba061cca790b97c275b56cdd1826b to 1bf3910ff9d3d4e6b30dbf3be414aef0ae892641 (from 0.11)