Log Message:
Update Rabbit to 0.5.3.

Changes 0.5.3 from 0.5.2: 2006-08-04

    * Theme related
          o added Day White/Night Black themes (TADA Tadashi)
          o added a slide for benchmarking theme (suggested by TADA Tadashi)
          o added Green Circle theme.
          o renamed Auto Slide to Slide Show.
          o clean-upped (codes of) theme.
    * Documentation update
          o INSTALL.win32 (Masao Mutoh, zunda¡Ë
    * Bug fixes
          o escaped '_' in page name for page name list in menu. (reported by \ 
Shugo Maeda)
          o fixed a GRClosure related problem. (akira yamada)
          o fixed a crash bug when reloading source.
          o fixed a bug that occurs with --output-html without --output-index-html.
          o fixed a bug that font configurations are ignored in printing.
    * improved GIMP support (akira yamada)
    * removed libgnomeprint support.
    * supported Wiki notation (HikiDoc). (included hikidoc.rb only in this release)
    * marked quality of PS/PDF output is enough.
    * added a toggle Magnifier action to menu.
    * added a toggle Spotlight action to menu.
    * supported partial rendering. (syntax in source is not supported yet)
    * {start,stop}_reload_timer -> {start,stop}_redraw_timer \ 
({start,stop}_reload_timer are still available for backward compatibility)