loadImage
Asynchronously loads the given image URL. Returns a promise that will resolve to an Image once loaded, or reject if the image failed to load.
Parameters:
| Name | Type | Argument | Default | Description | 
|---|---|---|---|---|
| url | String | Promise | The source of the image, or a promise for the URL. | ||
| allowCrossOrigin | Boolean | <optional> | true | Whether to request the image using Cross-Origin Resource Sharing (CORS). CORS is only actually used if the image URL is actually cross-origin. Data URIs are never requested using CORS. | 
Returns:
	
	
		Promise 
		
		 a promise that will resolve to the requested data when loaded.
         
    
    
        Example
// load a single image asynchronously
Cesium.loadImage('some/image/url.png').then(function(image) {
    // use the loaded image
}, function(error) {
    // an error occurred
});
// load several images in parallel
when.all([loadImage('image1.png'), loadImage('image2.png')]).then(function(images) {
    // images is an array containing all the loaded images
});
    
	
	
