Adding VIP Scanner version number to export.

Adds the version number to the top of the export like so:

```
twentyeleven - WP.com Theme Review
===================================
========= VIP Scanner 0.6 =========
===================================

```

Depends on #102

Closes #100
Update reported version number to use get_version().
Merge pull request #105 from Mobius5150/export_show_version

Adding VIP Scanner version number to export