Finished project
Added a line that displays growth rate
Added the option of plotting multiple samples with the plotData function
Fixed errors, added a few error messages, and began README file
Working directly with .md format not as great as .Rmd; made new .Rmd file and will try to convert to .md afterward
Fixed graph axes being swapped, finished README.Rmd, made some minor tweaks
Created markdown file from README.Rmd