fixed typo in lec 1 notes
started adawanced topics notes
deleted old misc. files used in planning.
added to advanced notes
started fleshing out notes/overview for 6th lesson
scrapped `manipulate` in favour of student presentations of their figures
added some more explanation for figure presentations
update notes for sutdent presentations
Merge branch 'master' of github.com:achubaty/datawranglR
added notes on mapping with example
removed references to US map assignment
Touch up some typos in maps.Rmd