Made VTKLoader's vertex parsing more robust as per suggestion #2046.

examples/js/loaders/VTKLoader.js

@@ -66,7 +66,7 @@ THREE.VTKLoader.prototype = {
 
 		// float float float
 
-		pattern = /([\d|\.|\+|\-|e]+)[ ]+([\d|\.|\+|\-|e]+)[ ]+([\d|\.|\+|\-|e]+)/g;
+		pattern = /([\+|\-]?[\d]+[\.][\d|\-|e]+)[ ]+([\+|\-]?[\d]+[\.][\d|\-|e]+)[ ]+([\+|\-]?[\d]+[\.][\d|\-|e]+)/g;
 
 		while ( ( result = pattern.exec( data ) ) != null ) {