issue #116 implement image support. Now done for locations, objects and creatures. Not all game data has image links yet though.
add another NPC. some data tweaks
turn off client debug
add a few more image links in data. remove default image from artefact
trap a couple more common player actions. fix toString on location.
issue #116 - remove location images.
fix failing tests - player location not set correctly
fix a load of save game bugs.
issue #180 - complete first round of contagion code - "zombie" is transmitted silently from cake 50% of the time. Biting creatures will transmit to them but it's all hidden at the moment and doesn't do anything.