installPackages: Install R packages by name or URL
Description
  Install R packages by name or URL.
Usage
"installPackages"(pkgs, types="auto", repos=getOption("repos"), ..., destPath=".", cleanup=TRUE)
Arguments
pkgs
A character vector specifying the names and/or the URLs
    of the R packages to be installed. destPath
Path where any downloaded files are saved.
cleanup
If TRUE, downloaded and successfully installed package
    files are removed, otherwise not. Limitations
This method cannot install any packages that are already in use.
  Certain packages are always in use when calling this method, e.g.
  R.methodsS3, R.oo, and R.utils.