Encapsulate localization

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37779 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4718 Initial GUI for web

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37780 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e