2.5

Several things in one commit; could not split this up easily,
one job invoked another, and so on. :)

- Added pulldowns for save/load .blend file in top bar.

- To enable "Save" without further popups (save over) 
  I've added a signaling function in window header to
  indicate a succesful save.

- On any undo push it now signals 'file changed'. This
  goes by notifiers nicely, but now registers only the
  undopushes, which is quite unreliable. "Changed" state
  shows in header as "Blender*" and for OSX with the
  standard close button black dot.

- Made screencast show a button in top bar indicating such,
  and allowing quit. No hotkey for quit yet... but ESC will
  keep casting now.

- Fixed new BLF_init(), which should be in WM_init() and not
  on any .B.blend read.

- Fixed CTRL+F3 "Save Screenshot", which was still using old
  fileselect code.

source/blender/windowmanager/WM_api.h

@@ -203,6 +203,7 @@ void		WM_jobs_callbacks(struct wmJob *,
 							  void (*update)(void *));
 
 void		WM_jobs_start(struct wmJob *);
+void		WM_jobs_stop(struct wmWindowManager *wm, void *owner);
 void		WM_jobs_stop_all(struct wmWindowManager *wm);
 
 #endif /* WM_API_H */