Major rewrite of scripting support:

Major rewrite of scripting support:
  - Add squirrel support to console
  - Reused ScriptManager from windstille (with some modifications now)
  - Added some new scripting commands (display, load_worldmap, load_level,
      wait_for_screenswitch, maybe others which I forgot)
  - Improved miniswig generated wrapper functions to check arguments passed and
    to catch exceptions and transform them into squirrel exceptions
  - All scripts are run as cooperative threads now
  - Sectors have a custom squirrel table now that contains all their objects and
    which has the (real) roottable set as parent. Sectorscripts use this
    sectortable as roottable.

SVN-Revision: 3287