client: prepare isoline legend graphic for reuse * Change loading of the legend image for the isolines to directly convert it into a dataUrl, so it can be re-used later. Doing it here as, this is the place where asynchronous loading is taking place. * License header: Add BER as author and 2019.

#!/usr/bin/env bash
exec 2>&1 ./cmd/gemma/gemma --config gemma.toml