Add documentation for adding a "Link.xml" definition and installation script to use it.

[SimonDarksideJ]

Reality Collective - Service Framework Feature Request

Is your feature request related to a problem? Please describe

When developing services, Unity in its infinite wisdom can exclude or strip service code from your project thinking it is not used, which is incorrect as services are instantiated at runtime dynamically.

Sadly, if Unity strips them, they are unavailable at runtime to use ;(

How would you classify your suggestion

• Documentation

Describe the solution you'd like

Add a document about how to add a proper "Link.xml" definition, assign its name space correctly and provide a sample install script so that Unity listened when you add one.