mpetazzoni/leaflet-gpx — pull request #2 by quelbs (2013-05-09 11:06:01+00:00)
Title:  	Enhancement to allow definition of polyline options 

With this enhancement you can add polyline options to the construction call, so you can change the color of the polyline.
```js
new L.GPX('track.gpx', {
async: true,
polyline_options: {
color:'red'
}
});
```