check, build, and install local source package
checkBuildInstallSourcePackage(dir, packs, packCheck, autoLibrary = FALSE)returns a character string that can be printed using "echo" and then copy and paste by the user to load or update the packages
character string containing the path name of the directory holding the package folders
character vector of the names of the packages
character vector of the names of the packages to check()
Boolean if TRUE automate library() command altering search path
I wanted to include "library(packs)" in the program, but this is not allowed. The user can "cat" the return value and copy and paste to facilitate doing this manually.