-- added re-eval entry to Scripts Win -> Scripts menu
-- added it also as a button at Info Win -> File Paths, Python path
-- updated bpymenus code:
    added 'Blender' tag, for version;
    made a .Bpymenus file be written only if there's actual data to save
    made file->export menu open a scriptspace only if none is available already
-- bug fixes (bugs 866 and 879, related) for linking and sharing mesh data:
http://projects.blender.org/tracker/?func=detail&atid=125&aid=866&group_id=9
http://projects.blender.org/tracker/?func=detail&atid=125&aid=879&group_id=9