Engine pool functions

[TheNormalnij]

After #3330 and #3275

The set function is implemented for building pool only.

number engineGetPoolCapacity(enum pool)
number engineGetPoolDefaultCapacity(enum pool)
number engineGetPoolUsedCapacity(enum pool)
boolean engineSetPoolCapacity('building', number newSize)

[Dutchman101]

Please resolve conflicts @TheNormalnij

[TheNormalnij]

Please resolve conflicts @TheNormalnij

done

[Dutchman101]

@TheNormalnij

done

There's still a conflict in mods/deathmatch/logic/CClientBuilding.h

[TheNormalnij]

There's still a conflict in mods/deathmatch/logic/CClientBuilding.h

It's a new one. Resolved

[Dutchman101]

This is quite a big change, and it appears no one's interested in reviewing it. Despite that, you did many passes over it yourself (kept improving upon it) and it's known your skills resulted in your own write access as well as not really producing bugs in other contributions. That's my reasoning for just going ahead with merge and saying it can be tested in nightly instead.

Thanks!