Update ImageLoader.hx

I recently had an issue where images served from a domain which I own would cause the browser to mark any canvas they were rendered into to become "tainted".  I have the correct HTTP headers regarding cross-origin-policies on the server, but the problem still persisted.  

I then found the following article:

Further info @ http://blog.chromium.org/2011/07/using-cross-domain-images-in-webgl-and.html

After making the changes to the mLoader lib, my app works as intended.  I figured the commit might be worth merging back into your repo.