Very first update to the Sapphire's Heaters mod!

Finally we can actually account for the plural in Heater(s).
This is kind of a small change and still contains some bugs.

Here's what has been changed:
- Heaters now run on car batteries. This will be possibly be changed in the future but allows for more realism.
- Added a new heater! "Outdoor Heater" which will be one of the heaters that will function outdoors. Currently all the heaters (both) works outdoors but will be fixed.
- Made so the heater recipes are not known before hand and will require you to find them out in the world. Electrican Issue #1 and Electrican Issue #2.

- There's currently an issue with the world model of the magazines, this will be fixed.

New Heater:
Requires:
Scrap Electronics = 4,
Metal Sheets = 4,
Metal Pipes = 4,
Screwdriver.

Electricity Lvl. 5,
Metalworking Lvl . 3


In the next update I'll re-do the model for the original Electrical Heater as well as add sounds.
I'll also add a powered heater by generators as well as making so each heater has unique stats, heat and radius.