public BufferedReader bufferedReader(final String charset)
      throws HttpRequestException {
    return new BufferedReader(reader(charset), bufferSize);
  }
Get buffered reader to response body using the given character set r and
the configured buffer size


@see #bufferSize(int)
@param charset
@return reader
@throws HttpRequestException
lib/src/main/java/com/github/kevinsawicki/http/HttpRequest.java