Fix the alignment issue in ffmpeg. Based on patch by Thorsten Jordan. Almost closes #757. Forwardport of [17595]

  Untested and likely to break stuff

(Fixes #848)

Revert wxwidgets.hpp change -- problem appears to have been that gui/wxwidgets had been getting built against non-Unicode lib.

HAVE_LIBHAL_1 means hal >= 0.5.0, which means dbus >= 0.3.0, which means HAVE_DBUS_1 and it has all required APIs

  Patch by Patrick McLean <chutzpah at gentoo d0t org> 

Sesame...

This should repair NB.

  Patch by Patrick McLean <chutzpah at gentoo d0t org>

  contrib update by me

  Before creating symlinks, make sure the actual binaries are installed. patch by Diego Petteno

  (no longer use libmatroska_pic ebml_pic)
  Patch by Diego Petteno, +additions by me.

Uses hal callbacks instead of pure D-Bus monitoring
Uses HAL >= 0.5.0 only if D-Bus >= 0.9.2 is present
(refs #99)

* libc.c: Also define the lldiv function itself on FreeBSD < 5 refs #840