[giac] new MAC OSX Giac

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28726 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fix in local variable coloring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@28727 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e