only hyperlink the session submission text if session submission is open
Review feedback
Fix line wrapping
Add an extension method for conditionally rendering links

The condition determines whether or not the supplied text is hyperlinked or not.
Merge pull request #228 from adrianbanks/remove-links-to-submission

Remove links to submission if session submission is closed.

Conflicts:
	DDDEastAnglia/Views/Home/About.cshtml