New in v1.18:
+ the Win32 xchm.exe binary no longer depends on the MinGW runtime - the new
binary has been compiled with the Microsoft Visual C++ Express 2010 compiler.
+ 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
+ made the source code compatible with Unicode/MSVC wxMSW builds.
+ fixed loading of search-in-titles results.