Add an hexagon builder function CDB_MakeHexagon.
Add an hexagon builder function CDB_MakeHexagon.

jmwenda/nationmaps,jmwenda/nationmaps,datapolitan/cartodb20,jmwenda/nationmaps,datapolitan/cartodb20,datapolitan/cartodb20,jmwenda/nationmaps,datapolitan/cartodb20