[trunk] - Language_- new language Mongolian (Cyrillic, Mongolia) - Монгол хэл (Монгол улс) language (mn_MN) Thanks to Ulzii

git-svn-id: http://piwigo.org/svn/trunk@22249 68402e56-0260-453c-a942-63ccdbb3a9ee
[trunk_public] Update mn_MN, thanks to : Ulzii

git-svn-id: http://piwigo.org/svn/trunk@22252 68402e56-0260-453c-a942-63ccdbb3a9ee
[language_switch] Add lt_LT, thanks to : vilisas

git-svn-id: http://piwigo.org/svn/trunk@22256 68402e56-0260-453c-a942-63ccdbb3a9ee