[Village AI] Rename file.

It is the AI for the whole village. Individual villagers don't process an AI.
[Village AI] Relink with new name.
[Village] Rename class from VillagerAI to just Village.

It'll contain more than just AI stuff.
It will also have a resource manager and a job manager.
[Village] Rename files (again).
[makefile] Change from village-ai to just village. Also add '-g' for more debugging output in case of crashes.