* thunar/thunar-statusbar.c, thunar/thunar-list-model.c,
	  thunar/thunar-favourites-model.c: Fix bug, where Thunar crashed when
	  NULL was returned for a mime info.
	* thunar/thunar-file.{c,h}: Turn this into an abstract base class, which
	  can be implemented in different ways.
	* thunar/thunar-local-file.{c,h}: Implementation of the abstract
	  ThunarFile class for local files handled by the 'file:///' URI
	  scheme.
	* thunar/thunar-trash-file.{c,h}: Implementation of the abstract
	  ThunarFile class for trashed files handled by the 'trash:///' URI
	  scheme and the trash can itself. This is currently only a boilerplate
	  and waiting for the trash backend to show up.
	* thunar/Makefile.am: Add new classes to the build framework.




(Old svn revision: 16340)