Deals with missing libPaths arg, and takes first

Usage

doLibPaths(libPaths, standAlone = FALSE)

libPaths: The library path (or libraries) where all packages should be installed, and looked for to load (i.e., call library). This can be used to create isolated, stand alone package installations, if used with standAlone = TRUE. Currently, the path supplied here will be prepended to .libPaths() (temporarily during this call) to Require if standAlone = FALSE or will set (temporarily) .libPaths() to c(libPaths, tail(libPaths(), 1) to keep base packages.
standAlone: Logical. If TRUE, all packages will be installed to and loaded from the libPaths only. NOTE: If TRUE, THIS WILL CHANGE THE USER'S .libPaths(), similar to e.g., the checkpoint package. If FALSE, then libPath will be prepended to .libPaths() during the Require call, resulting in shared packages, i.e., it will include the user's default package folder(s). This can be create dramatically faster installs if the user has a substantial number of the packages already in their personal library. Default FALSE to minimize package installing.