Article on floatValue

[winsmith]

The floatValue property in signals is pretty undocumented because I seem to have told almost no one about it. This is a ticket to write an article about it.

Goal: Tell people the floatValue property exists and give a few examples on how to use it

TOC

• Intro: all payload dimensions you send to TD are typed as strings, but there's a special case
• What is floatValue? FloatValue is a way that you send a metric – a numerical value – to TD
• You can average it, sum it up, etc
• Code example

Basically this but with a bit more content: TelemetryDeck/Issues#233 (comment)

[warpling]

It'd be great to explain the pros/cons to using the floatValue field for Ints as well!