* Implement flashing lights if battery level is too low (use fuelgauge.isAlerting() and setAlertThreshold())
* Need to implement PIR distance sensor to verify door of safe closed
* Need to add support for Adafruit Trinket Pro
* Add note about adjusting values for distance
* Finish Fritzing documentation (breadboard / schematic)
* Bill of Materials for all pieces/parts/etc