Add prefix `sat` (1e8) for satoshi-quoted coins
Add prefix `sat` (1e8) for satoshi-quoted coins

This is useful for coins with very small BTC value.

Fixes #77

OttoAllmendinger/gnome-shell-bitcoin-markets,OttoAllmendinger/gnome-shell-bitcoin-markets,OttoAllmendinger/gnome-shell-bitcoin-markets