Adding LibraryView prototype files into DynamoCore project

This pull-request is initial in series of pull-requests connected with adding new design prototype into Dynamo.

@Benglin, please review.

The code almost not changed of version you send me by email. Please check if I added files in correct places and namespaces. Thank you.
I think these are temporary and we will transition over to use the existing ```BrowserRootElement``` and ```BrowserItem``` related classes/lists, am I right?