Word Documents; added SetContentWiki

As an alternative to SetContentHtml or SetContentString there is now a SetContentWiki for Word Document Bookmarks. Note, this may be easier to use to do simple text mark-ups.

ISWordDocumentBookmark and ISWordDocumentBookmarks now support the function SetContentWiki. Note, this simply converts the wiki text into HTML.

Wiki Text mark-ups include:

* Bold **
* Italic //
* Small --
* Micro ---
* Warning !!
* Positive ++
* Link [[URL|Title]]
* Line Break - vbNewLine or <br>