Patch 4

Possibility to specify redirect parameter name like this (on the bottom - HtmlRedirectParam):

```csharp
Plugins.Add(new AuthFeature(
    container.Resolve<IAuthSession>,
    new IAuthProvider[] {
        new CredentialsAuthProvider()
    })
    {
        ServiceRoutes = new Dictionary<Type, string[]> {
            {typeof(AuthenticateService), new[] { "/autentifikacija", "/autentifikacija/{provider}" }},
            {typeof(AssignRolesService), new[] {"/dodajugrupu"}},
            {typeof(UnAssignRolesService), new[] {"/ukloniizgrupe"}}
        },
        HtmlRedirect = "~/a/Home/Prijava",
        HtmlRedirectParam = "redirekcija"
    });
```