Added name support in GUI and commandline version.
When restoring from commandline, subfolders will now be named like the source folders, if only one source folder is given.
When restoring from GUI, the names will be suggested like in the commandline.
It is no longer required that the unused folders exists when restoring a multi-source backup from the GUI.
Added size tooltips to the restore GUI window with the list of backup chains.
Now correctly deletes old signature cache files, even if they use the old names.
git-svn-id: https://duplicati.googlecode.com/svn/trunk@542 59da171f-624f-0410-aa54-27559c288bec