Starting work on the coal face of multi-tile entities. Nothing uses raw
x and y anymore, instead relying on x() and y() methods. This should
smooth things out a bit, and will allow me to use Point for a lot of the
new "centres" concept.
Merge branch 'master' of https://github.com/Somfin/DungeonFarmer.git

Clearing a readme update and a release update.