Issue #1889

introduce a new version of equals method for SGVector but specialized for float data type ,As stated from a community member the best way to do this might be to specialize the old method for complex type and make the new version work for anything else, but I am not able to do it yet. In case this is efficient enough just message me and I will add also the equals version for SGMatrix if this is not what it's needed any guidelines would be apreciated  .