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
overview edits
Merged the changes sent by Beth
Merged the addition of the line art for the approximation.