Remove Dsl module and move functions inside HtmlNode and HtmlDocument
Remove Html intermediate namespace, to make it consistent with the other providers (part 1)
Remove Html intermediate namespace, to make it consistent with the other providers (part 2 - fix indentation)
Remove Html intermediate namespace, to make it consistent with the other providers (part 3)
Merge pull request #614 from ovatsus/HtmlTypeProvider

Reorg modules.namespaces for Html to make them more consistent with the other providers