replaced double-quoted uu with single-quoted uu; just u on its own gets misinterpreted because of a hack in runestone paver
Merge pull request #47 from aerenchyma/pset5sol

Add pset5 solutions
fixed naming of a couple actex directives to avoid duplication
wider text area, for wider code samples
Added solutions for problem 1 & 2
added problem 3 solution
added problem 3 solution
added problem 4 solution
added solutions for 4 and 5
added solution for problem 6
added solution for problem 7
added problem 8 solution
Merge pull request #48 from nickdotreid/pip

Problem set 6 solutions
bug fix
PS4 solutions
added Installation chapter, first draft
add high-level overview writing
and some definitions -- some formatting to do, mac instrs TBA
admonitions, a few more changes (not instrs yet)
fixed some formatting, in process of... working on mac instructions from Dr.Chuck's/the windows instrs