UFO:Alien Invasion Code

* use the trunk base content

* delete the base to allow to copy the trunk one

* Deleted some unchanges stuff after talk with mattn.

* mission.ufo updated mission music definitions and added details for the estate mission
* menu_geoscape.ufo, seq_ingame.ufo, menu_lostwon.ufo, seq_credits.ufo, menu_main now use new music
* campaign.ufo add estate, spedition, pdi and falconcrash missions (falconcrash & spedition included to get feedback, testing and to prompt someone to finish them!)
* all music tracks have had gains automatically adjusted via the vorbisgain utility to attain some degree of normalization (note this does not affect the stream data, only a header field)

* two music tracks contributed by Paul B (hopefully he will return to extend and improve these, but they are quite good regardless)