// create a new file input stream with the input file specified
// at the command line
// create a new org.apache.poi.poifs.filesystem.Filesystem
// get the Workbook (excel part) stream in a InputStream
// construct out HSSFRequest object
// lazy listen for ALL records with the listener shown above
// create our event factory
// process our events based on the document input stream
// once all the events are processed close our file input stream
// and our document input stream (don't want to leak these!)