The Stacks project

Reorder the section on valuation rings

Thanks to Laurent Moret-Bailly for emailing the latex changes

Patch for algebra.tex by Dario Weissmann

Thanks to Dario Weissmann
Lightly edited by Johan de Jong

Fix isolated point stuff

	It turns out that I was thinking about isolated points in the
	wrong way. Apparantly an isolated point is just what I would
	have called an open point and what I thought was an isolated
	point is a closed isolated point.

	Also added: A lemma stating that a morphism is locally
	quasi-finite if and only if it is locally of finite type with
	discrete fibres.

Started tags infrastructure

	new file:   scripts/add_tags.py
	modified:   scripts/functions.py
	new file:   tags/initial_tags
	new file:   tags/tags

Separation properties

	modified:   algebra.tex
	modified:   schemes.tex