Update 11-regex.tex

Three changes made to this chapter
Update 12-network.tex

Four changes submitted.
Update 13-web.tex

Two changes made to this chapter, but the following is for your consideration:

On page 163, the last sentence of the first paragraph needs something after the word 'can': "Perhaps they have free and pay tiers of their services or have a policy that limits the number of requests that a single individual can during a particular time period."

I need your input to make any change there.
Update 14-database.tex

A few changes made here except to the figure. The title should be "Tracks" instead of "Friends" (page 173).
Update 16-tasks.tex

 A few changes made here except for he last sentence in numeral 1.
Update AA-windows.tex

Only one change made here.
Update 00-cover.tex

Archivo 00-cover.tex traducido al español.
Update README.md

One correction made: from Caliper to Calibre
Update 00-cover.tex

Added two minor changes.
Archivo 00-preface.tex translated

First commit of 00-preface tex. Ready for proofreading.
Update 00-preface.tex

First proofreading done.
00-preface.tx

This file is ready for proofreading.
Revert "Update 00-preface.tex"

This reverts commit 274c310cb39a9071990ba183472d945c4293fbb8.
resolve conflict