The Stacks project

Fix wrong order variables in stacks

Thanks to Praphulla Koushik
https://stacks.math.columbia.edu/tag/02ZM#comment-4002
https://stacks.math.columbia.edu/tag/02ZM#comment-4004

Fix typos in stacks.tex and examples-stacks.tex

Thanks to Yogesh More
http://stacks.math.columbia.edu/tag/0372#comment-1428
http://stacks.math.columbia.edu/tag/02ZM#comment-1430

Spell check: words starting with d, e, f, g, D, E, F, or G

Whitespace changes

LaTeX: Remove useless brackets

LaTeX: \Ob

	Introduced a macro

	\def\Ob{\mathop{\rm Ob}\nolimits}

	and replaced any occurence of \text{Ob}( with \Ob(. There are
	still some occurences of \text{Ob} but these are sets, not the
	operator that takes the set of objects of a category.

LaTeX: \Mor

	Introduced a macro

	\def\Mor{\mathop{\rm Mor}\nolimits}

	and replaced all the occurences of \text{Mor} with \Mor.

Potpourri

	of changes. Some of them suggested by Brian Conrad, and one by
	Alex Perri.

Smorgasbord of changes

	Loose ends:
		algebra: add colimit over almost directed cats
		sites-modules: exactness of g_!
		more-morphisms: exactness of g_!
		spaces-morphisms: closed immersions and sheaves
		spaces-more-morphisms: conormal sheaves
	should be fixed up soon

Added new tags to the project

	modified:   tags/tags

Fix dumb mistake

	modified:   stacks.tex

Hopefully enough for a while on (abstract) stacks

	modified:   categories.tex
	modified:   stacks.tex

Horrible, horrible...

	modified:   stacks.tex