This is a real simple player, which implements a photophyllic robot  -
a moth.

When the moth is carrying nothing, the player flags all bases with
lights.

When the moth is carrying more than 1/3 its capacity, the player flags
the delivery points for the carried packages with lights.

When the moth is carrying less than 1/3 its capacity, the player does
both, and the moth gets to choose.

Water is modelled surrounded by shadow, to discourage the moth.

The moth always bids 1 except when next to a light, when it bids 2.

When the moth is at a base, it picks up the heaviest package it can
carry.  When it's at a delivery point, it delivers the appropriate
package.  Otherwise, it flutters around following light gradients.

The light propagation stuff is pretty poor, but Good Enough.

And that's about it.  Use runme <host> <port>
