- Added general structure and basic files.
 - The following pbo-files will added in future:
    - brg_africa.pbo
    - ibr_a4.pbo
    - ibr_adventure.pbo
    - ibr_aifv.pbo
    - ibr_airports.pbo
    - ibr_arl.pbo
    - ibr_arl2.pbo
    - ibr_as350lingor.pbo
    - ibr_boats.pbo
    - ibr_hangars.pbo
    - ibr_m14.pbo
    - ibr_maule.pbo
    - ibr_pinz_lingor.pbo
    - ibr_plants.pbo
    - ibr_police.pbo
    - ibr_tucano.pbo
    - ibr_unisolcorp.pbo
    - ibr_vblvab.pbo
    - ibr_venatorhmw.pbo
    - ibr_zsu57.pbo
    - lingor.pbo
    - lingor_bank.pbo
    - lingor_objects.pbo
    - lingor_roads.pbo
    - lingor_sounds.pbo
    - mbg_buildings_2.pbo
    - pracs_mig21.pbo