Update 1 - Chill out, man

• Added a coolant tank system and card
• Added coolant support for engines and phasers
• Revamped the sensors to make it more performant and consistent. Finished a minimal feature set.
• Added unit tests for half of the system classes
• Started on a frame for lower resolution screens.

That's it for this week. Be sure to file any feature requests on the Github repo.

Alex