* Various little fixes
   - BeOS interface compilation fix by Rene Gollent.
   - DirectX plugin compilation fix by Gildas Bazin.
   - removed %ebx spill in the iMDCT plugins.

  * Fixed the BeOS compile typo.
  * The ALSA plugin is back.
  * A gift for Gildas: plugins don't rely on backlinking any more. The
    drawback is the dirty magic in include/modules_export.h which has to
    be included whenever a module needs one of the functions in it. But
     a) we should less and less rely on those functions
     b) no plugin code modification was needed

   The BeOS and MacOS X modules may be broken when compiled as plugins,
   I'll check this later when I can reboot under BeOS.

  * Merged Makefile.common and Makefile.modules.in into Makefile.modules
  * Updated version number and ChangeLog to 0.2.72
  * Additional plugin Makefile cleaning, probably the last.

  * Added .cvsignore files in the plugins directories.
  * Additional Makefile cleaning for built-in modules.
  * Fixed Makefile for Solaris target.