Log of changes to the lecture notes file

Nov. 3, 2016, the first version posted
Nov. 11, section 1 complete, rough versions of other sections
Nov. 13, section 2 complete
Nov. 15, section 3 complete
Nov. 18, section 4 complete
Nov. 19, section 5 complete
Nov. 20, typose removed
Nov. 22, 2016, references updated
Nov. 23, 2017, revised and corrected