The Stacks project

Fix typo in homology.tex

Thanks to Fan Zheng
http://stacks.math.columbia.edu/tag/011G#comment-654

Mostly fixes of typos in response to comments from arp

Thanks to arp!
http://stacks.math.columbia.edu/tag/09JM#comment-288
http://stacks.math.columbia.edu/tag/09JP#comment-289
http://stacks.math.columbia.edu/tag/014F#comment-290
http://stacks.math.columbia.edu/tag/08RI#comment-291
http://stacks.math.columbia.edu/tag/014H#comment-292
http://stacks.math.columbia.edu/tag/0642#comment-293
http://stacks.math.columbia.edu/tag/014I#comment-294
http://stacks.math.columbia.edu/tag/011L#comment-295
http://stacks.math.columbia.edu/tag/014L#comment-296
http://stacks.math.columbia.edu/tag/014M#comment-297
http://stacks.math.columbia.edu/tag/011G#comment-298

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 changes in homology.tex

	modified:   homology.tex

Finished proof of lemma on image of affines under finite morphisms

	modified:   homology.tex
	modified:   limits.tex

Typos in homology.tex

	modified:   homology.tex

Homotopies continued