* The reason why pending downloads tick ever upwards is because missing assets are never signalled to the TextureSender
* Rectifying this is not straightfoward, but this will constitute the next patch.
* This does not explain the memory leak.
* However, I'm no longer sure they were even a big contributory factor (to this particular leak, there are other causes of other leaks). I need better measurement techniques
* Removed most of my debugging gawp
