Move big crystal in crystalline biome to boulder category

[BlackYps]

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[clivepaterson]

Oh yep, makes sense.

I generated a few 10k maps with this change, to see what the mass totals look like.
Most of the maps generated with ~20k worth of props reclaim, which is a good average for 10k maps, (Badlands is about 23k mass which is a good example of an average 10k ladder map).

I did manage to generate 1 map which used the BoulderFieldPropGenerator, and the reclaim total was very high (100k). Maybe too high.
This feels like "The Ditch" kinda map, but then again, "The Ditch" is a classic. I kinda like these high reclaim maps, and I like "The Ditch".