add cru logo, update logout styling, add tile to reference done page (+1 squashed commit)
Squashed commits:
[ae1fe1f] Revert "add cru logo and update log out link"

This reverts commit 5099c86884577628c466b18dc897d8cc10688543.
Merge branch 'add-header' of github.com:CruGlobal/sp into add-header