insert PageRank lab into Vol1.tex

Also fixed a compile error with pagerank lab.
implement solutions to page rank lab in python

A mostly efficient translation from MATLAB.  Tries to take advantage of
nice Scipy/Numpy features.
removed weakly connected problem
Merge branch 'pagerank' of https://github.com/ayr0/numerical_computing into pagerank
Spacing and formatting fixes.
Merge branch 'develop' into pagerank
More spacing and typo fixes.
minor typo and spacing fixes.
Removed unnecessary array allocation.
Merge branch 'pagerank' of github.com:insertinterestingnamehere/numerical_computing into iinh-pg

Conflicts:
	Applications/PageRank/PageRank.tex
fix occurences of web page
update figure in PageRank lab

Updated to matplotlib figure.
use more canonical function for making a 1d matrix
Restructured the problems in the Page Rank lab.
Another editing pass on the PageRank lab.
Merge branch 'iinh-pg' into pagerank

Conflicts:
	Applications/PageRank/PageRank.tex
Merge pull request #505 from ayr0/pagerank

Page Rank revamp