Reorganize the documentation files.
Import new SQLite core docs.
Enhance the NDoc3/HtmlHelp build script to support transforming SQLite core library documentation links as necessary.
Some readability improvements to the NDoc3/HtmlHelp build script.
Update version history docs.
Refresh all included SQLite core library documentation (e.g. SQL syntax).
Update table-of-contents topic names.
Improve use of object hash codes by the SQLiteModuleEnumerable class.  Clarify via comments that methods of the SQLiteNativeModule class are exempt from using CheckDisposed.
Add more tests.
Add another test.