Changes in this release:
Fixed handling of Unicode apostrophes when removing "'s" to spell check the word without it.
Added support for spell checking comments after an #endregion directive.
Updated the word splitter and regular expression classifier so that they only merge two consecutive string literals if they are of the same type (two verbatim string literals for example).
Added default WPF text box exclusions for the Sandcastle Help File Builder WPF property pages and form controls.