PolylineVolumeGeometry binormals are incorrect

[hpinkos]

It uses GeometryPipeline.computeBinormalandTangent.
At some point, r = Infinity, causing NaN later down the line
https://github.com/AnalyticalGraphicsInc/cesium/blob/master/Source/Core/GeometryPipeline.js#L1282

Demo:

var viewer = new Cesium.Viewer('cesiumContainer');
var scene = viewer.scene;

var shape = [new Cesium.Cartesian2(-10000, -10000), new Cesium.Cartesian2(10000, -10000), new Cesium.Cartesian2(10000, 10000), new Cesium.Cartesian2(-10000, 10000)];

var redTube = new Cesium.GeometryInstance({
    geometry : Cesium.PolylineVolumeGeometry.createGeometry(new Cesium.PolylineVolumeGeometry({
            vertexFormat : Cesium.VertexFormat.ALL,
            polylinePositions : Cesium.Cartesian3.fromDegreesArray([
                 90.0, -30.0,
                 90.0, -35.0
            ]),
            cornerType: Cesium.CornerType.MITERED,
            shapePositions: shape
    })),
    attributes : {
        color : Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.RED)
    }
});

scene.primitives.add(new Cesium.Primitive({
    geometryInstances : redTube,
    asynchronous: false,
    appearance : new Cesium.DebugAppearance({
          attributeName : 'st'
        })
    }));

var g = Cesium.PolylineVolumeGeometry.createGeometry(new Cesium.PolylineVolumeGeometry({
    vertexFormat : new Cesium.VertexFormat({position: true, normal: true, binormal: true}),
            polylinePositions : Cesium.Cartesian3.fromDegreesArray([
                 90.0, -30.0,
                 90.0, -35.0
            ]),
            cornerType: Cesium.CornerType.MITERED,
            shapePositions: shape
    }));
g.attributes.normal = undefined;
scene.primitives.add(Cesium.createTangentSpaceDebugPrimitive({
     geometry : g,
     length : 100000.0,
}));

[mramato]

It would be really nice to get #3605 into master (which depends on this). How hard is this going to be to fix?