pisilinux-default-settings-lxde, libfm and libfm-extra

1-pisilinux-default-settings-lxde was created
2-lxpnal data files moved to pisilinux-default-settings-lxde
3-login.png removed from pisilinux-themes for lxde and lxqt
4-lxde-common:data files moved to pisilinux-default-settings-lxde
5-libfm splitted libfm and libfm-extra