Make MegaSpiders functionally bigger.

[erdrik]

In the MegaSpider's description from the Infestation Event, it says they are "a genetically-engineered giant insectoid the size of a bear".
The .xml code for the MegaSpider says it's baseBodySize = 1.2.
A bear's baseBodySize = 2.15.

From what I understand of combat, larger targets are easier to hit with weapons.
I suggest changing the MegaSpider's baseBodySize to match the bear at 2.15 ...
That or change the description so it doesn't lie to the player...

(I prefer the MegaSpider be bigger and easier to hit since it is deadly enough already, but I don't know what is intended.)