fix #1012: AgaviTranslationManager::_n() and _c() ignore custom locale independent format
remove all references to removed 'affects' parameter in the validation
closes #1014
merge a3e4d3b7b027ee3823d8cf2bdfd6ad0e472f6d28 to 4d4ec93897c187dcf52a4461abf5599c83f0fe1b (from 1.0)