Eveything Narrative's Nuclear Tweaks for Nicer Ratios

This is a standalone mod to reduce the difficulty associated with nuclear power by making
the numbers nice and round.

The downside is a somewhat higher fuel consumption.

It contains the following changes:

1. Nuclear reactors no longer waste fuel when at maximum temperature.
2. Nuclear reactors produce 60 MW of power instead of 40 MW, meaning a
   single uranium fuel cell of 8GJ lasts exactly 8000 ticks, or 133⅓ seconds.
3. All vanilla heat interfaces operate at a maximum temperature of 1015°C, which is
   exactly 1000°C above ambient temperature.
4. The maximum temperature of steam has likewise been raised to 1015°C.
5. Heat exchangers produce steam at 515°C, exactly 500°C above ambient temperature
   for an energy density of a round 10kJ per unit nuclear steam.
6. Heat exchangers exchange 12MW of heat energy and 120 units of water into 120 units of 515°C steam per second.
7. Steam turbines convert 60 units of steam per second into 6 MW of power.
8. The neighbor bonus has been reduced to 50%, meaning each interface between two
   reactors counts as one additional reactor, rather than two.

The ratios are as follows: