Add message when LocalFileList and OCFileLIst are empty
Show message when the file list is being loading and when it is empty
Fixed bug related when changing orientation of device, message for empty folders disappear
Save message in onSaveInstanceState when folder is empty for allowing that it disappears if device orientation is changed
Fixed bug. It is not possible to refresh folder when it is empty
Changes after CR
Merge pull request #578 from owncloud/show_message_for_empty_list

Show background message when list of files is empty