engine: Add branded link to console resources

This patch adds an external link to console resources (for ovirt engine
hosted on ovirt wiki).

The link is added to following places:
 - landing page (new section)
 - (basic) user portal right-hand (details) pane
 - console options dialog.

Change-Id: I5f7316e6ce5032123edc2e39b4939d0c8dab1cb1
Signed-off-by: Frantisek Kobzik <fkobzik@redhat.com>
Bug-Url: https://bugzilla.redhat.com/997418