Make sure we really load featured materials

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26927 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Switching back to production Tube

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26928 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
minor changes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26929 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
typo in material url

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26930 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Worksheet Design Android

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26931 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e