Reduce database hits when calculating loads.
Add prefetching to updates fetcher.
Alphabetize co-opers in steward forms.
Estimate load change after chore actions.
Simplify .gitignore.
Hide inactive users in some displays.
Merge branch 'appearance' into development

Conflicts:
	chores/static/chores/chores_list.js
Loosen reversion permissions.
Split up stylesheet into separate CSS files.
Remove balance mover. Wrap chore cells.
Tweak display of balances.
Add spacing to footer to match header.