Created maze image.
redid spacing in markov chains lab.
Added the problem with the maze to the markov chains lab. Also fixed some
typos and the references in that lab.
Added adjacency matrix file and the .py file to generate it to the Markov
chains 1 lab.
Added notebook with markov lab solutions.
Added .py solutions to markov lab and made some formatting changes in the
notebook version.
Thickened lines in maze graphic in markov lab.
Merge pull request #108 from insertinterestingnamehere/markov

Markov