[web] new mathquill with \eqnarray and \textcolor

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23479 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
GGT JSON API

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23480 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e