Fixed URL on Markov's biography
Added reference on Viterbi algorithm
Updating notes
Updates to bibliography

Edited metadata on some papers.

Also added a paper on NELL: Never-Ending Language Learning to the
introduction.
Added an epigraph

Now it's simply a matter of editing epigraph.tex when I need to add an
epigraph. At the moment, I left my favorite quote from William Gibson
about Pattern Recognition.