Neuer Untergrundmodus - Slopes in Tunneln

Code:
    CHANGE: cursor now works with full 3d-coordinates

    ADD: (mostly gerw) sparse data and overlay in main map for passenger destinations

    ADD: No connections found via overcrowded stops, if overcrowded flag active

    ADD: do not create goods/passenger/mail when the only route is over an overcrowded stop (simuconf.tab no_routing_over_overcrowded)

    ADD: more vehicle messages show in main screen

    CHANGE: ask for language only once (prepare for difficulty dialoge)

    ADD: UNDO for powerlines

    FIX: convoi details (and info- windows) were not always correctly (re)opened

    CHANGE: convoi, station and line handles autoextent their capacity

    FIX: chanhing schedule bz stop mover did not worked on open schedule windows

    CHANGE: climate dialoge now completely gui_numberinput_t

    CHANGE: convois will only choose stops that can fit their entire length

    FIX: (mostly gerw) tunnel maintenance costs

    ADD: (z9999) tunnel can have predefined way (new syntax, need new makeobj)

    ADD: completly ignore message button at beginning of dialoge

    CHANGE: faster map (non-isometric) on very large maps and no crashes with extremely large maps anymore

    ADD: paste letters under windows with CNTRL+V

    ADD: button "withdraw all" in line window

    CHANGE: simuconf.tab cost values can now go up to 48 bit (should be enough for insanely high starting capital)

    CHANGE: addons can be put now into the user folder with the same name than the main pak folder

    CHANGE: skins are now read first from program dir/skin then from own dir/skin and then from pak set

    ADD: (gerw) dragging of wayobj and many other tools, adding wayobj-remover

    CHANGE: (Dwachs) better intercityroad creation

    ADD: (Dwachs) sliced underground mode

    ADD: (z9999) 8 layout for city buildings allow also closed corners

    ADD: (Dwachs) buying cityhouse will protect them from renovation

    ADD: Underground slope (in principle even compatible to older savegames) using standard slope tool

    ADD: changing slopes now also with objects on top

    ADD: (Dwachs) tram track can be build in road tunnels