[PATCH v2 4/6] views/xmlrpc: Add serialization documentation

[Finucane, Stephen]

> Add some documentation for the XML-RPC serializers, including examples.
> This will help developers understand exactly what the API *should* be
> returning for each given method.
> 
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

Merged.