Compiles a Markdown file to HTML.
# S3 method for default
compileMarkdown(filename, path=NULL, ..., outPath=".", header=NULL,
  metadata=getMetadata(filename), verbose=FALSE)The filename and (optional) path of the Markdown document to be compiled.
Additional arguments passed to markdownToHTML.
The output and working directory.
A named list with meta data that will add as <meta> tags in the HTML <head> section.
See Verbose.
Returns the pathname of the generated HTML document.
The input encoding is based on getOption("encoding") and
  the output encoding is "UTF-8"
  (forced by markdownToHTML).
Internally, markdownToHTML is used.