Patch for /trunk/php-excel.class.php

```
Added initial support to save to filepath.
```

Original issue reported on code.google.com by `matt.daemon660` on 11 Oct 2012 at 12:32

Attachments:
- [php-excel.class.php.patch](https://storage.googleapis.com/google-code-attachments/php-excel/issue-22/comment-0/php-excel.class.php.patch)
