Check data (tsvs) for converting to built-in datasets

[stephlocke]

The tsvs are in extdata, we need to convert them to built in datasets but we need to check the file structure to see if it's a simple conversion

[LucyMcGowan]

I think .tsv i just tab separated so it should be a quick conversion with something like:

dat <- read.table("./inst/extdata/BoxPlots.tsv")
save(dat, file = "./inst/extdata/BoxPlots.Rda")

[stephlocke]

Lucy did this with PR #4 !