signalk-kindle-display v1.0.7

SignalK on Kindle.

This is a fork of https://www.npmjs.com/package/@digitalyacht/sk-on-kindle

I modified the 4 way display to suit my needs

signalk must provide the following data available or no fields will be displayed. environment.depth.belowTransducer environment.wind.angleApparent environment.wind.speedApparent navigation.speedThroughWater navigation.courseOverGroundTrue