Clean up .gitignore
Clean up .gitignore

Remove some non-project-specific stuff that people are likely
(encouraged, even) to put in their own global git ignores.

juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff,juped/archaeology-cutoff