The Stacks project

More text in definition bimodule

THanks to Hao Zhang and Laurent Moret-Bailly
https://stacks.math.columbia.edu/tag/00CV#comment-8366
https://stacks.math.columbia.edu/tag/00D1#comment-8367

LaTeX: get rid of useless brackets

Code changes only

	Changes to algebra,tex which have no effect on the produced pdf
	files.

Started tags infrastructure

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

More neurotic changes

More neurotic cleaning up

	modified:   algebra.tex
	modified:   algebraic.tex
	modified:   categories.tex
	modified:   coding.tex
	modified:   cohomology.tex
	modified:   constructions.tex
	modified:   conventions.tex
	modified:   etale.tex
	modified:   flat.tex
	modified:   fpqc-descent.tex
	modified:   homology.tex
	modified:   hypercovering.tex
	modified:   injectives.tex
	modified:   introduction.tex
	modified:   modules.tex
	modified:   morphisms.tex
	modified:   properties.tex
	modified:   schemes.tex
	new file:   scripts/parse.py
	modified:   sets.tex
	modified:   sheaves.tex
	modified:   simplicial.tex
	modified:   sites.tex
	modified:   spaces.tex
	modified:   stacks-groupoids.tex
	modified:   stacks.tex
	modified:   topology.tex

Added section on tensor product by Fraser Hiu

	modified:   CONTRIBUTORS
	modified:   algebra.tex