Merge pull request #1 from naomilong/master

converted lab1 from latex to markdown
Merge pull request #2 from naomilong/master

actually added lab1 latex to oldLatex folder
prep for pull
Merge branch 'master' of https://github.com/andrewpbray/oiLabs
Merge pull request #3 from naomilong/master

converted lab2 to .Rmd
Merge branch 'master' of https://github.com/andrewpbray/oiLabs
added lab6 markdown
move lab 6 materials
convert lab4A to markdown
correct typo in to-do
fix nested lists
add items to to-do
add horz rule
style changes to labs 1, 2, 3

added horizontal line before OYO
changed numbering in OYO from lazy to unordered with - and three spaces
changed formatting of probability equations in lab 2 to Latex with [\ \] that displays nicely
added line to style guide about backticks