GNOM/documentation

[Override-6]

Create a diagram that explains how the GNOM System is made and how it works

• Show an overall view of the network
• Shows Shared Caches part
• Shows Traffic part (packet channels and Contextual objects)
• Show how the persistence uses the Object linkers
• Show how Object Network Presences Handling works

Add doc for all classes that figures in api.gnom.*

Finish the wiki that explains :

• The reasons of why the GNOM has been created
• GNOM overall concept, problems that the system solves and possibilities it adds for the user
• Network Objects
• Network Objects Reference
• Network Object Linker