Log Message:
Changes 1.18:
* updated PT translation.
* added --notopics and --noindex as command line parameters.
  They inhibit loading the topics tree and the index list, respectively.
* added Vim-like document scrolling key bindings.
* made the source code wxWidgets 2.9 friendly.
* documents using Chinese simplified now display properly.
* fixed Windows application crash that happened when the user clicked the
  "Fonts.." button.
* made the source code compatible with Unicode/MSVC wxMSW builds.
* fixed loading of search-in-titles results.