SAK-26176 Fix typos in en_GB properties.
WL-945 Added an Oxford University 'Declaration of Authorship'.

Conflicts:
	assignment-bundles/assignment_en_GB.properties
	assignment-bundles/resources/assignment.properties
WL-573 SAK-16165 Include site URL in assignment email.
WL-903 Added restriction of the submission type when using Turnitin.

I have added mutual exclusion restrictions to the user interface for creating
new assignments. Specifically, I have enforced the restriction that the
submission type must be 'attachments only' when content-review (Turnitin) is
being used. This means that if you select to use content-review, 'attachments'
is automatically selected and likewise content-review is deselected if any
submission type other than attachments is specified. In each case, focus is then
given to the control which was changed in order to give a cue to the user that
something changed in the interface. (Note: this commit is analogous to one I
made for WL-712 on the 2-5-x branch, but I re-crafted this by hand as the
previous attempt was broken).

WL-938 Restricted to submission of single files when Turnitin is used.

This is very similar to a commit made against WL-679, however crucially that
commit involved applying the logic in the wrong place, so it caused other
related functionality to break (see WL-947, WL-868).

WL-925 Submission via a URL disabled when Turnitin is being used.

This is very similar to a commit made against WL-680, however crucially that
commit involved applying the logic in the wrong place, so it caused other
related functionality to break (see WL-947, WL-868).

WL-1013 Undone most of previous implementation in order to replace with another.

[*] Restored Turnitin controls to original location.
[*] Removed Javascript associated with enforcing 'attachments only' in UI.
[*] Message about Turnitin == 'attachments only' *remains*.

WL-1363 Error when noting for TII to have.
If none of the attachments associated with an assignment submission are accepted by TII then a NPE would have been generated.

WL-1913 Only allow single upload with Turnitin.
WL-2050: make the default submission type "single uploaded file"

Replaces: WL-1025 Changed default assignment submission type to 'attachments only'.
WL-943 Copy the references files from resources and re-write site IDs.

Conflicts:
	assignment-impl/impl/src/java/org/sakaiproject/assignment/impl/BaseAssignmentService.java
WL-377 SAK-26177 Localise assignments tool.
WL-377 There is no close date.
WL-377 Supplement -> Summlementary
WL-377
WL-2230 Localise assignments
WL-377: Localise Assignments tool

This drops a heading that isn't needed.
WL-2051: Gradebook mentioned in Assignments tool
WL-1120: add current UK time to Assignments submission page

Conflicts:
	assignment-bundles/assignment_en_GB.properties
WL-1121: Prepend the time zone to the Assignments Due Date
WL-2337: make accept until date 1 day later than end date by default (for ass 1)

Conflicts:
	assignment-tool/tool/src/java/org/sakaiproject/assignment/tool/AssignmentAction.java
WL-2332: Small issue of capitalisation in Release email options
WL-1551 Add new columns to the CSV file, submission date and lateness

Conflicts:
	assignment-impl/impl/src/java/org/sakaiproject/assignment/impl/BaseAssignmentService.java
 WL-2825 SAK-26177 Mark column named "grade" in exported CSV files

Conflicts:
	assignment-bundles/assignment_en_GB.properties
WL-2704 removes the default option for the choice of turnitin repository.