Functions to copy R script templates for no automatized analysis

[lpantano]

It would be useful to have this code in a function:

source = file.path(system.file("rmarkdown", package="hbcABC"),
          "Rscripts", 
          "singlecell",
          "clustering_seurat.R")
file.copy(source, "clustering.r")

so we can just call copy_clustering_seurat(final_location). Good things about making functions:

• you can use auto-complete in R, so you can see all the files and navigate to the one you want to use.
• It would be good to support copying from remote to have the last version :)

[mjsteinbaugh]

That's essentially what the prepareTemplate() function in bcbioBase does, which we can modify to copy scripts instead:
https://github.com/hbc/bcbioBase/blob/master/R/prepareTemplate.R