* Makefile.am:

  * Makefile.am:
    + Call $(srcdir)/toolbox from $(builddir) instead of $(srcdir).
    + Call $(builddir)/vlc-config instead of $(srcdir)/vlc-config, because
      generated files end in $(builddir).
    + Added -Imozilla to the mozilla plugin link flags.
    + Look for mozilla/vlcintf.idl in $(srcdir).
  * configure.ac:
    + Set VLC_CONFIG to $(builddir)/vlc-config instead of $(srcdir)/vlc-config.
  * toolbox:
    + Look for Makefile.am in ${srcdir}, and Makefile in ${builddir}.
    + Prepend ${srcdir} to header files we handle.
  * m4/vlc.m4:
    + Look for vlc-config.in.in in ${srcdir} but generate vlc-config.in in
      ${builddir}.
  * modules/gui/skins/src/dialogs.cpp, modules/gui/wxwindows/interface.cpp:
    + Include the pixmap with a path relative to the current directory.

   This commit should fix builds that use --srcdir (Closes: #319).