Convert reST to PDF using rst2pdf (which converts from rst to PDF
using the ReportLab open-source library).
rst2pdf(input, command = "rst2pdf", options = "")The input rst file.
Character string giving the path of the
rst2pdf program. If the program is not in your PATH, the full path has to be
given here.
Extra command line options, e.g. '-v'.
An input file *.rst will produce *.pdf and this output
filename is returned if the conversion was successful.