BUG(2427): Order option for 'add' command.
BUG(2427): Order option for 'add' command.

Added -o/--order option to 'add' command when adding files in the library.
This makes it possible to sort entries before adding them to the playlist.

six600110/xmms2,theefer/xmms2,krad-radio/xmms2-krad,mantaraya36/xmms2-mantaraya36,mantaraya36/xmms2-mantaraya36,theefer/xmms2,krad-radio/xmms2-krad,mantaraya36/xmms2-mantaraya36,mantaraya36/xmms2-mantaraya36,theeternalsw0rd/xmms2,theefer/xmms2,xmms2/xmms2-stable,six600110/xmms2,oneman/xmms2-oneman,xmms2/xmms2-stable,krad-radio/xmms2-krad,six600110/xmms2,xmms2/xmms2-stable,krad-radio/xmms2-krad,chrippa/xmms2,oneman/xmms2-oneman,xmms2/xmms2-stable,xmms2/xmms2-stable,oneman/xmms2-oneman,six600110/xmms2,theefer/xmms2,oneman/xmms2-oneman,chrippa/xmms2,six600110/xmms2,oneman/xmms2-oneman,theefer/xmms2,mantaraya36/xmms2-mantaraya36,theeternalsw0rd/xmms2,theefer/xmms2,oneman/xmms2-oneman,theeternalsw0rd/xmms2,chrippa/xmms2,chrippa/xmms2,krad-radio/xmms2-krad,chrippa/xmms2,oneman/xmms2-oneman,theefer/xmms2,krad-radio/xmms2-krad,mantaraya36/xmms2-mantaraya36,theeternalsw0rd/xmms2,xmms2/xmms2-stable,theeternalsw0rd/xmms2,theeternalsw0rd/xmms2,six600110/xmms2,mantaraya36/xmms2-mantaraya36,chrippa/xmms2