public byte[] getBytecode () throws IOException {
        source.seek(offsets[0]);
        int len = source.readInt();
        byte[] ffile = new byte[len];
        source.readFully(ffile);
        return ffile;
    }
Return the Lua bytecode for this cartridge.
main/src/main/java/cgeo/geocaching/wherigo/openwig/formats/CartridgeFile.java