of area query and put the code in boxtree.area_query. Closes #1.

This change also removes mention of "geometric lookup" in favor of
"balls to leaves lookup."

Implement level restriction.



See merge request !6

[no ci] Fix documentation. The post-processing scan proceeds over particles.



See merge request !5

Area query builder: Make internal peer list finder an attribute.

I realized using the memoize functionality was kind of silly for managing what is essentially an attribute.

See merge request !2

Refine weights



See merge request !4

Conflicts:
	.gitlab-ci.yml