Provide better navigation and separation between BV 1.0, 1.1 and 2.0 resources

[gunnarmorling]

The biggest problem is that the top level menu only references 1.1 pages, even if a 1.0 page is displayed. 1.0 and 1.2 should be better separated on the site.

[gunnarmorling]

Migrated from https://hibernate.atlassian.net/browse/BVAL-481

[gsmet]

Fixed this one with the new website layout.