Edited Unassigned: Add support for matrix parameters at help page. [1122]

Since it is not guaranteed that query parameters are being cached, matrix parameters should be used where applicable. But when using matrix parameters the help page wont show these requests. Our team decided to use standard query parameters in URIs only for sorting and paging and other non filtering actions on resources. For filtering we want to use matrix parameters.

Example:

```
/// <summary>
/// Get customers
/// </summary>
/// <param name="name">Name of the customer.</param>
/// <param name="surname">Surname of the customer.</param>
/// <returns>Returns a list of customers.</returns>
[Get("api/customers;name={name};surname={surname}")]
public IEnumerable<Customer> GetByFilter(string name, string surname)
{
...
}
```

Instead of:
```
/// <summary>
/// Get customers
/// </summary>
/// <param name="name">Name of the customer.</param>
/// <param name="surname">Surname of the customer.</param>
/// <returns>Returns a list of customers.</returns>
[Get("api/customers?name={name?}&surname={surname?}")]
public IEnumerable<Customer> GetByFilter(string name, string surname)
{
...
}
```

Kind regards,
Andy