Updates home page so map is given more space

Rather than setting a pixel limit for the map, we set it to be a percentage
of the width of the window. Given that we now have more space to play with,
and the telemetry data doesn't need any more space, I've configured the
map to take up 2/3 of the screen width.
Updates version of app to 0.2

I'm considering the change between 0.1 and 0.2 to be the addition of the
map to the home screen.