formattable: Create 'Formattable' Data Structures

#' The formattable package
#'
#' This package is designed for applying formatting on vectors and
#' data frames to make data presentation easier, richer, more flexible
#' and hopefully convey more information.
#'
#' @name formattable-package
#' @docType package
#' @details
#' Atomic vectors are basic units to store data. Some data can be read more easily
#' with formatting. A numeric vector, for example, stores a group of
#' percentage numbers yet still shows in the form of typical floating numbers. This
#' package provides functions to create data structures with predefined
#' formatting rules so that these objects stores the original data but are printed
#' with formatting.
#'
#' On the other hand, in a typical workflow of dynamic document production, `knitr`
#' and `rmarkdown` are powerful tools to render documents with R code to different
#' types of portable documents.
#'
#' `knitr` package is able to render a RMarkdown document (markdown document
#' with R code chunks to be executed sequentially) to Markdown document.
#' `rmarkdown` calls `pandoc` to render markdown document to HTML web page.
#' To put a table from a `data.frame` on the page, one may call [knitr::kable()]
#' to produce its markdown representation. By default the resulted table is in a plain
#' theme with no additional formatting. However, in some cases, additional formatting
#' may help clarify the information and make contrast of the data.
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