0.01: New App!
0.02: Use HRM data and calculations from Bangle.js (don't access hardware directly)
0.03: Fix timing issues, and use 1/2 scale to keep graph on screen
0.04: Update for new firmwares that have a 'HRM-raw' event
0.05: Tweaks for 'HRM-raw' handling
0.06: Add widgets
0.07: Update scaling for new firmware
0.08: Don't force backlight on/watch unlocked on Bangle 2
0.09: Grey out BPM until confidence is over 50%
0.10: Autoscale raw graph to maximum value seen
0.11: Automatic translation of strings.
0.12: Minor code improvements
0.13: Minor code improvements