Original link returned 404

Adeed http://www.bash.academy/ to the Bash List

Just a small typo/error I found while reading through the list.

Add  Canvassing and Learn CSS Layout the pedantic way to HTML & CSS section.

Judgement call. This is a 3Com "white paper". Though 3Com has copyright, white papers are typically freely distributed to advance a technology. It doesn't appear as if Prof. Ricci has anything to do with the white paper. The ooriginal link was likely lost on 3com's acquisition. I suggest replacing it with https://web.archive.org/web/20080401000000*/http://www.3com.com/other/pdfs/infra/corpinfo/en_US/501302.pdf
because if the owner wants to remove it they can do so.

According to Prof. Papadimitriou, the pdf we were linking to (as well as others on the internet) are not authorized by the current copyright owner, McGraw Hill.

Added:

Basic Algebra, Digital Second Edition (Anthony W. Knapp)
Advanced Algebra, Digital Second Edition (Anthony W. Knapp)

A book about an Nginx-based web development platform called OpenResty.

Removed the following link:
* [Python Algorithms](http://kysmykseka.net/koti/wizardry/Programming/Python/Apress%20-%20Python%20Algorithms%20Mastering%20Basic%20Algorithms%20in%20the%20Python%20Language.pdf) (PDF)