Compiles an RSP document.
# S3 method for default
rcompile(..., file=NULL, path=NULL, output=NULL, workdir=NULL, envir=parent.frame(),
  args="*", until="*", verbose=FALSE)character strings with RSP markup.
Alternatively, a file, a URL or a connection from
     with the strings are read.
     If a file, the path is prepended to the file, iff given.
A character string or a connection specifying where
     output should be directed.
     The default is a file with a filename where the input filename
     has been prepended by compiled- and saved
     in the directory given by the workdir argument.
The working directory to use after parsing and
     preprocessing.
     If argument output specifies an absolute pathname,
     then the directory of output is used, otherwise the
     current directory is used.
The environment in which the RSP string is
     preprocessed and evaluated.
Specifies how far the compilation should proceed.
See Verbose.
Returns an RspString, RspDocument or
  an RspFileProduct (depending on argument output).