bcStangle               A function to extract the code chunks from the
                        book for the online supplement
bcSweave                Wrapper for Sweave
cache                   cache an R expression to use the result
                        without recomputation in later Sweave events
checkVerbatim           Formatting and standardization checks on book
                        chapters
imageSize               File info for all image files in the book
requireAllBook1         Load a lengthy list of packages that are used
                        in the Book
