Feature Request: Worksheet per item in List

I'd like to create one worksheet per item from a list.

For example in case I pass an IEnumerable to the template
`template.AddVariable(customers);`
and the name of the template worksheet is something like
`{{ item.Name }}`
the report generator should iterate through the customers list and create one worksheet for every item in the list.

Another approach:
passing a variable data that contains an `IEnumerable Customers`
`template.AddVariable(data);`
and worksheet with label
`{{ Customers.Name }}`
should trigger the generation of a single worksheet per customer.