A weave function for RSP documents.
 This function is for RSP what Sweave is for Sweave documents.
rspWeave(file, ..., postprocess=TRUE, clean=TRUE, quiet=FALSE, envir=new.env(),
  .engineName="rsp")The file to be weaved.
Not used.
If TRUE, the compiled document is also post
    processed, if possible.
If TRUE, intermediate files are removed, otherwise not.
If TRUE, no verbose output is generated.
The environment where the RSP document is
        parsed and evaluated.
Internal only.
Returns the absolute pathname of the generated RSP product. The generated RSP product is postprocessed, if possible.