Added SendAsync templates for cleaner method calls.

[Henry00IS]

Instead of writing:

await Connection.SendAsync(new InvocationDescriptor { MethodName = "SendMessage", Arguments = new object[] { Connection.ConnectionId, "Hello World" } });

You can now type (up to 16 arguments) with templates:

await Connection.SendAsync("SendMessage", Connection.ConnectionId, "Hello World!");

[Henry00IS]

Conflicts have been resolved.