Added variable passive cooling amounts depending on what biome the player is currently in.

The initials values are not balanced, they are simply placeholders.
Changed to using vanilla biome temperature values for cooling and implemented some of DZCreeper's suggestions.
Some bugfixes for the variable biome cooling.
Merge pull request #230 from Andrew2448/heattweaks

Added variable passive cooling amounts depending on what biome the player is currently in.