Sub 'continue_or_die' updated for upload and update cases

For simplified **alpha test**. Example of result:

```
alexandre$ ./post-userscripts-org.pl my-post-test.js

  2 errors prohibited this script from being saved
  ------------------------------------------------

  There were problems with the following fields:

    * Name can't be blank

    * Src Missing beginning of metadata header: // ==UserScript==

alexandre$ 
```