SmartPoi js utilities update

Hi Smart Poi enthusiasts!

I have been working on more stability and functionality for the offline web utilities for Smart Poi. (see the code here: https://github.com/tomjuggler/SmartPoi-js-utilities)

Check out the video walkthrough here:

If you want to try it out, make sure to get the latest Smart Poi firmware in order for this to work: https://github.com/tomjuggler/SmartPoi-Firmware