Empty collection as default value for various lists about gedcomx-csharp

[weitzhandler]

After digging a bit more about this, I'm still looking for a way to achieve:

1. Have all the list properties return an empty list and never null
2. Make sure this behavior doesn't impact the serializer output nor the serialization process performance (having to initialize so many lists for nothing)
3. Get rid of all those AddFact SetFact methods. Person.Facts.Add(fact) should be used.

[shadowca]

Hi @weitzhandler
is this project still alive?
First of all i would bringt the models under test. so you can directly see if your changes have impact on the serialization. Then i would change the model.
I have forked this and try to resolve the problem of the null lists.

[weitzhandler]

Looks like the project is alive and kicking. However due to priorities I unfortunately left my genealogy project on the shelf for a while.