Celsius 2.0: Major update (RimWorld 1.4 only)

Main changes:

- Much of core code rewritten from scratch. I found ways to get rid of main drawbacks of the old methods (such as limits on how fast heat could travel) while fixing lots of bugs and streamlining the algorithms.
- Saves from Celsius 1 are automatically converted. Mid-save downgrading from Celsius 2.0 to Celsius 1 is not supported.
- Rebalanced all thermal values (except autoignition temperatures) for vanilla and modded buildings, terrains and stuff. Most problems with building thermally efficient bases and ice that wouldn't melt should hopefully be resolved (or at least resolvable) now.
- Heat conductivity now depends on Insulation and is measured in percent. Its stat page now has detailed explanations. Heat capacity is also a more abstract value.
- Better handling of ice melting, e.g. buildings, pawns and other things may drown when they fall in deep water.
- Melting and freezing now always happens at 0C.
- Now showing correct temperature at the specific cell in the bottom-right corner of the screen.
- Full support for Windows mod including open/closed states of windows.
- Optimized the code so that the mod should run even smoother than before despite being more accurate and powerful.
- Fixed an unknowable number of bugs. Then probably added some more.

- Open doors now let through more air; vents are more efficient
- Snow now melts faster under rain
- Snow disappears if ice underneath has melted
- Fixed issues when a map already has ice on it
- Disabled profiling & reduced unnecessary logging => slight performance improvement

- Updated for RimWorld 1.4
- Celsius now replaces vanilla temperature overlay
- Added options to use vanilla temperature colors and to disable cell/terrain temperature tooltip
- Reduced environment convection (from 50% to 30%) and heat push (from the factor of 10 to 4 compared to vanilla); the former setting is not automatically changed in existing games
- Temperature overlay button only works now when no tabs are open to prevent conflicts

- Adjusted some default settings: lowered convection conductivity effect from x200 to x100 and air heat capacity from 3000 to 2500 J/C. It won't affect existing configurations, so you are advised to reset the settings yourself.
- Fixed temperature toggle hotkey remapping not working and having a wrong label

- Rebalanced thermal properties of many (probably most) objects to make them more consistent
- Some buildings (such as doors or vents) can now leak air resulting in higher heat conductivity through convection; this is more realistic and accurate than the old system of making open doors and vents simply "disappear"
- Added shortcut for toggling temperature map (B by default, can be changed in game settings), per multiple requests
- Added support for Windows mod
- Removed unneeded ignoreStuff property for buildings
- Building stats now show effective conductivity with air. and heat capacity is displayed in kJ/C (instead of J/C)
- Small improvements and fixes related to the temperature map
- Some more optimization

- Rebalanced heat capacities and conductivities for nearly everything; hopefully, it will make things look more natural now (i.e. walls will isolate better, water/ice will freeze/melt faster)
- Heat push from heat (and cold) sources is now 2x stronger
- Added support for Insulation mod
- Added settings for ambient mountain temperature. Instead of vanilla 15C, you can set it to annual average, season average, current outdoor temperature (which will basically make mountains act the same as any other cells) or any temperature you like
- Switched to using square root of heat conductivity instead of linear value and volumetric heat capacity instead of specific heat capacity (nothing you should be concerned with)
- Fixed snow melting 14 times faster than it should
- Fixed the issue of some thermal properties not being updated immediately when you changed settings during play
- Did some little optimization here and there

- Added an environment diffusion factor setting (it is the first stab at better balancing isolation vs temperature diffusion)
- Fixed wrong temperature overlays when you have multiple maps
- Fixed error spam when a new map is created

- Rebalanced a lot of stats to (hopefully) fix issues with freezers and heaters not holding temperature (recommend to reset mod settings)
- Fixed thermal stats (capacity, conductivity and autoignition temperature) not showing in the info panel
- Optimization for complex maps with many rooms and maps without water or ice
- Heat controllers may work more accurate when outdoors

Initial release