Optimization

Changed /'s glowing arrow image to be the one hosted on my CDN, to
ensure lower latency, since the previous one took ~270ms while my own
CDN took ~30ms to be able to get the image.

(no more hot-linking, yay!)

Also removed several empty files or files with stuff that are not going
to be used.

The removal of preloadimages(); occurred since there is not any plan to
utilise it soon.