[Webtest] [dev] migration to htmlunit issues

[Dierk Koenig]

Hi,

when compiling and testing the current codebase 
without extensions, I see these failing selftests:
- followframe into a nested frame
  (the ':'-notations was dropped when upgrading to
  HttpUnit 1.6. We may need to re-introduce it or
  to mimic the HttpUnit 1.6 behaviour in WebTest)
- clickbutton with button element like <button...>
  (this issue was fixed with the upgrade to HttpUnit
  1.6 but HtmlUnit seems to not recognize it.
  Good, we have the selftests... :-))

When creating the documentation I get errors from
the webtests that test the generated documentation.
There seems to be something wrong with the "not"
logic.

so long
Mittie