Wiki update

Plugins & Plugin Development Sonos
1

I have done few little changes in the Wiki in the chapter “Making a Sonos “Say” something” and I have added a new chapter “Making a Sonos play an alert message”.

Note that the chapter “Creating a Sonos scene under UI5” references an action SetFileToPlay that does not exist anymore.

2

I just updated the wiki : Sonos Wireless HiFi Music Systems

[ul][li]The list of variables has been updated, and few variables that are not updated when using the UPnP event proxy are mentioned: Sonos Wireless HiFi Music Systems
[li]I added a new chapter explaining how to play something: Sonos Wireless HiFi Music Systems

What should be updated:

[ul][li]The general introduction[/li]
[li]User interface snapshots[/li]
[li]“Creating a Sonos scene under UI5” chapter is obsolete, action "SetFileToPlay does no more exist. It should be replaced by an example with “PlayURI” action.[/li][/ul]