Merge pull request #58 from mpsonntag/filebrowser

Filebrowser

LGTM
Merge pull request #59 from mpsonntag/listcell

ListCell: Two lines list cell class
MetadataNavState: add state properties
MetadataNav: view and controller for navbar
MetadataNav: view and controller for main panel
MetadataNav: stubs for favorite panel
MetadataNav: stubs for list panel
MetadataNav: some renaming
MetadataNav: implementation for metadata favorites
FileAdapter: add type parameter
MetadataNav: implementation for metadata list
MetadataNav: basic functions are working again
added a two-cell list rendering to the query panel
MetadataNav: import clean up (should fix compile error)
Merge pull request #61 from asobolev/master

added a two-cell list rendering to the query panel

OK
Merge pull request #60 from stoewer/gndata-editor-56-metabrowse

First draft of the metadata browseer
Resources: utils and comparators
VisualItem: mark as deprecated
Resources: fix bugs
ResourceAdapter: refactor and use utilities of Resources