Dead links on repo's GitHub page

[muzimuzhi]

On this repo's GitHub Page, the following three links are all dead:

• the link to NumberTheory.pdf, used to show a sample book using tufte-latex
• the links to week5lecture.pdf and its source file, used to show a sample handout using tufte-latex

If this would be safely changed to the corresponding links to sample-book.pdf and sample-handout.[pdf|tex] which are contained in this repo, I am willing to provide a push request.

Related source code lines:

tufte-latex/index.html

Lines 38 to 46 in b98d8bb

	<p>Some examples of the Tufte-LaTeX classes in action:</p>
	<ul>
	<li>
	<a href="http://swtools.wordpress.com/papers/">Some papers</a> by Jason Catena using the handout class</li>
	<li>A <a href="http://people.ucsc.edu/%7Eweissman/MathClubTalk2009.pdf">handout</a> for a math club lecture on volumes of n-dimensional spheres by Marty Weissman</li>
	<li>A <a href="http://slugmath.ucsc.edu/mediawiki/index.php/Image:NumberTheory.pdf">draft copy of a book</a> written by Marty Weissman using the new Tufte-book class</li>
	<li>An <a href="http://tufte-latex.googlecode.com/files/week5lecture.pdf">example handout</a> (<a href="http://tufte-latex.googlecode.com/files/Week5Lecture.tex">source</a>) using XeLaTeX with the <code>bidi</code> class option for the ancient Hebrew by Kirk Lowery</li>
	</ul>