Add ability to switch media renderes to lineIn mode

[ChriD]

Add ability to switch media renderes to lineIn mode

[ChriD]

I have to fiddle how this works... I think only a special container will be set

[ChriD]

Same as #26 ?!

[ChriD]

It seems it is no duplicate because i cant set the "Source Select" value onto a connector to line in?!

[ChriD]

Line In Mode can be set by using the correct single id from the main "0/Line In" Oath.
I have created a loadLineIn(_roomNameOrRoomDeviceUDN) method on the virtual renderer