v0.2.1

Changelog

• Add hall sensor
• Add magnetic beacons
• Base beacon class
• Power law hall effect calculation
• Separate sensor and beacon modules

Planned features

• Refactor sim class (it's a mess)
• Procedurally generated maps (.json instead of .png, allows for more flexibility but likely worse performance)
• Maybe fix all the circular references because OOP is hard

Full Changelog: 0.2.0...0.2.1