Merge pull request #27 from ministryofjustice/dev-clive

TRIBS-66 - text change on column headings
favicon.ico fix.
Merge pull request #28 from ministryofjustice/dev-clive

Update admin/decisions template to match regular decisions one
The admin panel login screen doesn't include the admin banner anymore.
Code cleanup after reading warden's source code.
admin wrapper css class toggle