Locates and parses all vignettes.
parseVignettes(path=".", pattern="[.][^.~]*$", ..., drop="^dummy.tex$")The directory where to search for vignettes.
Filename pattern to locate vignettes.
Additional arguments passed to parseVignette().
A vector of filename patterns of vignette sources
   to be ignored.
Returns a list where each element corresponds to an
  identified vignette source file.  A file is considered to be
  a vignette source file if it has \Vignette.*{} markups
  in the top 50 lines.
  Each such vignette element consists of a named list with
  the parse \Vignette.*{} information.