fix #1099: AgaviTranslationManager::_n() and _c() ignore custom locale independent format
remove all references to removed 'affects' parameter in the validation
closes #1101
merge 4a03eefd8f9a7f29e6a95cbed805536adbed68a9...61953fec59e30502fccd167b0bbfbc5c3c590a78 (from 1.0)