#74 LabelRenderer cannot handle images on the classpath

[sciss]

The current way LabelRenderer handles images is not compatible with images supplied on the classpath, unless they are merged into the prefuse jar. This is because IOLib is asked for an URL, not passing in a Referrer class, hence ending up looking up resources in the class loader of IOLib, not being able to find images that are included in any other jar on the classpath.

The only quick workaround is to use a custom LabelRenderer class, not very elegant obviously.

[sciss]