Fixed reflections.

Major update : Performance fixes.

- Major restructuring of buildings, especially in the background to try and improve CPU load.
- Disabled bump mapping on a large number of 'mid-ground' elements (objects too far to see the effect, or wholly within shadow) to reduce GPU load.
- More aggressive particle fading in key areas.
- Reduced draw distance. I've offset this by adding simplified buildings in the scrolling background layer - you shouldn't see much if any difference with 'far' draw distance, but with medium and short you may notice buildings 'fill in' with detail as you get closer to them. This is the simplified building in the background (a cube typically) being drawn over by the more detailed model once you get close.

Funny thing; this is meant to be the start of a series so I wanted some areas that showed off the setting.
The observatory on the hill to the left of the start is one of these areas, with an unobstructed view out over the bay. It wasn't meant to be a shortcut or a faster route - and was actually a second or so slower than just going straight.

More than half of players at the time of writing have taken that road thinking it's a shortcut.

Oops.

I've added something on that route to negate the time penalty; it probably won't be any faster than going straight (and if it is, it will only be marginal), but it shouldn't be slower anymore at least. And maybe it's more engaging to play than just driving straight to the first corner.

- Tentative performance fixes - reduced particle density (especially particle fog and grass).

- Altered visuals for checkpoints to make it harder to confuse them for the hop obstacles. Checkpoints are now cyan/green instead of the same magenta as the hops.