* strongly improved the speed of make VLC.app and make VLC-release.app by only copying the xcode project and the Resources folder instead of various plugins and most importantly the framework to a temporary folder

 -- There is no "auto size" feature as in the wx interface to
 automatically resize the interface so the video is displayed in its
 native size.
  -- The interface doesn't resize itself down to its minimal size when
  video playback is stopped and the control widgets re-organise themselves
  in a weird way.
Should fix part of playlist resizing.

* added navigation controls to the Help window (implemented with minimal affords by using WebKit's builtin methods). We need a nicer home button graphic, though ;-)

Qt4 - VLM. enable/disable from the list controls the VLM. small fixes and correction of VLM requests.

BEWARE: If you have non-recompiled plugins, they WILL crash.

 - remove useless IsSubmodule (submodules have NO configuration items anyway, and any sensible UI won't show modules with no configuration)
 - free checks for NULL anyway

* modules/gui/wxwidgets: fix breakage introduced by changeset 23581 and 23579. Breaking perfectly working modules just because you don't care about them is just rude.