Branding: initial Tuakiri branding

A large part of the visual branding comes from already-branded
applicationbase.

Changes here:
* update logo sizes to the Tuakiri logo in applicationbase (310x82)
* replace references to AAF with Tuakiri (and the respective support desks)
* update link to attribute release documentation with Tuakiri-specific one
Branding: adjust links to attribute documentation

AAF has per-attribute documentation pages on their wiki.

As Tuakiri only has a single page with overall attributes documentation,
adjust the layout of the snapshot page and remove the fourth column with
the URL.  This can be simply done by removing the referenceURL parameter
to the template and removing the table heading.  Add instead the URL to
the overall page in the header of the listing.