pbtools: Various reusable bits of code

#' pbtools.
#'
#' @name pbtools
#' @docType package
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#' @docType data
#' @keywords datasets
#' @name themecolours
#' @title Colour set for theme - 4 tints of 6 colours
#' @usage data(themecolours)
#' @format Matrix with 4 columns and 6 rows - 4 tints (25\% steps) of 6 colours
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#' @docType data
#' @keywords datasets
#' @name ifgbasecolours
#' @title Colour set for theme - IfG corporate colours - 7 base colours only
#' @usage data(themecolours)
#' @format Matrix with 1 column and 7 rows - 7 base colours only
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#' @docType data
#' @keywords datasets
#' @name ifgcolours
#' @title Colour set for theme - IfG corporate colours - 4 tints of 7 colours
#' @usage data(themecolours)
#' @format Matrix with 4 columns and 7 rows - 4 tints (25\% steps) of 7 colours
NULL

#' @docType data
#' @keywords datasets
#' @name themebasecolours
#' @title Colour set for theme - default ugly colours (6 base colours only)
#' @usage data(themecolours)
#' @format Matrix with 4 columns and 6 rows - 4 tints (25\% steps) of 6 colours
NULL