The Stacks project

Typo in etale-cohomology

Thanks to Yijin Wang
https://stacks.math.columbia.edu/tag/03R2#comment-7272

Try to use L/K notation for field extensions

We could also try to consistenly use "field extension" and not just
"extension" and consistently use "ring extension", etc.

References to Brauer groups chapter

	Add some references to Brauer Groups chapter from the chapter on
	etale cohomology

Added new chapter to the project

Etale Cohomology: More edits

Tags: Added new tags

	Mainly new tags for lemmas/propositions/theorems in the chapter
	on etale cohomology.

Etale Cohomology: White space changes only

Etale COhomology: More edits

	Coding style...

Etale COhomology: More edits

	Coding style...

Etale Cohomology: Added it to the project and more edits

	A solution to the problem mentioned in the previous commit may
	be to add parts of the Chapter as Appendices maybe in a smaller
	font. Still not sure.

Etale Cohomology: Lots of edits

	One of the problems is that the coding style is completely
	different and nonuniform. Another is that there is a lot of
	material for which it will not be possible to find proofs
	internally in the stacks project for a long time. Perhaps we
	need to introduce a way of indicating this in the document.

	A better solution is perhaps to add only those parts to the
	actual stacks book published on the web which mesh well with
	the stacks project.

CONTRIBUTORS: Added Min Lee

	See previous commit