Version 0.2.1

Changelog for this version:

• Implemented a file-based mutex process lock to prevent multiple processes running at once
• Implemented better optional config file path behavior
• Bug fixes and refactoring for ThermalManager:
  • Some fixes for hysteresis boundary behavior
  • Rewrote the fan speed selection algorithm
  • Implemented configurable increase/decrease weighting for smooth speed for configurable sensitivity during temperature changes