Added support for importing XLS (Excel) files.

Added support for importing XLS (Excel) files.
Download available:
-Products
- Store categories
- Shop collections
- Manufacturers Store
- Articles
- Bases of e-mail addresses
- Forwarding list.

Added support for importing XLS (Excel) files.

Added sending of the report to e-mail, after import. And also the function of updating the data of goods in other languages is added.Added new template with demo and quick install.Complete Update of the File Manager on BooStore