proposed solution to issue 1134

[m00sey]

Title:
Setting timeout on router client/service

Description:
Resolves #1134

Summary:

Decorator on router client for setting a timeout. The timeout is then propagated down to the route/mediator service.

I chose to modify the interface with an additional setTimeout method.

I preferred this to changing the Register() signature but options there could be:

explicitly with a timeout:
Register(connectionID string, timeout time.Duration) error

introduce some form of options for Register:
Register(connectionID string, opts ..*.Option) error

This seemed the most backward compatible with what is out there.