Issue: Google in depth results for VW articles

This required updating the wiki on vBulletin 3 & 4 to HTML 5. Note that this change will result in HTML on wiki pages not validating under vBulletin, since some of vBulletin 4's default style (and lots of vBulletin 3) used techniques which are not allowed in HTML 5. VaultWiki tries to convert some of these when they occur on wiki pages, but others are left alone. From what I can tell, the conflicts seem to fallback to HTML 4 behavior fine.

This change has the added benefit of creating more meaningful HTML outlines on wiki pages, which certain crawlers and software use to determine the importance of different sections of content.

Switching to HTML 5 accounts for most of the development time of this feature.

Still working on adding the most relevant microdata properties to pages.

good news!

Note that existing validation tools (including Google and Yandex) appear to have parsers that are not up-to-date with HTML5+microdata spec. I am specifically concerned with this snippet of the spec (http://www.w3.org/TR/microdata/#attr-itemtype):
Which basically says an element can have an attribute itemtype="A B", as long as A and B are both from the same microdata vocabulary (like schema.org), so that the itemscope would gain itemprop properties from both A and B. However, none of the validation tools seem to be aware of this, default to itemtype="A", and return an error that "A B" is an invalid itemtype.

Even the alternate method provided by itemprop="additionalType" does not seem to work as designed as far as the tools are concerned. It does not actually apply any properties of the specified type.

It remains to be seen if this prevents any of the metadata from being read and cached as search results by Google and other sites. Nevertheless, it seems that the bug is with Google's tool (and other tools), since they are not capable of handling some variations of valid itemtype attributes.

Marking this as implemented in the next release.