Merge pull request #15 from KellyBlack/dev

latex edits
Merge pull request #16 from KellyBlack/dev

mean and variance vectors
R simulation update
R simulation update
adding more info to presentation
mean and variance vectors
Merge pull request #17 from candaceliu/candace_dev

talk
presentation and milstein
First draft of a file to demonstrate how to write to a csv file on the fly.
Completed the example of an R file to write out a csv file on the fly.
Added first draft of the line drawing.
overview edits
Added a curve and marks for an approximation to the solution
Wrote an image for the approximation line art.
Merged the changes sent by Beth
Merged the addition of the line art for the approximation.