Merge pull request #1 from nadiaroning/master

Fix true/false mismatch
Update README.md
Merge pull request #2 from nadiaroning/master

change gridref to chunk
Add creature_at function; clean up unused funs
Add chunk tests; fix some broken stuff
Add gitignores
Make Cowboy serve client files
Make client WS find the server automagically
Add missing static symlink
Make creatures receive events

Event pubsub juggling code was extracted from
artifice_client and moved into artifice_chunk,
where it can be called from artifice_creature
too.
Add brain skeleton
Add brain files
Merge branch 'master' of https://github.com/mtornwall/artifice
fix test creature