code: public TextResource text(String anUri, AbstractContent content) throws IOException {
  		return text(URI.create(anUri), content);
  	}
docs: Get a plain text resource for the specified URI by POSTing to it.
  
  @param anUri
  the URI to follow
  @return a plain text resource, if available
  @throws IOException
  if content type sent is not a plain text, if the connection could not be made and gazillion other reasons