Add Registration page.

Add a new View to the HomeController to display the registration form
from Eventbrite.
Link to Registration page via nav bar.

Add a link to the new registration page on the nav bar.
Merge pull request #164 from alastairs/registration

Add Eventbrite integration for registration
Add Agenda page
Added Agenda action
Initial agenda layout
extract the navigation bar into a separate (partial) view
remove superfluous code
fix typo
inline some code
render the menu as a series of links
add some more tests
hide the list of session when the agenda is published
rename the "About" link back to "New to DDD?"
Rename the default action
swap some assertions
Add tests for the accommodation link
fix the controller and action names
Merge pull request #176 from adrianbanks/extracting-menu-v2

Extract the navigation bar into a separate (partial) view.

Conflicts:
	DDDEastAnglia/Views/Shared/_Layout.cshtml
Some styling, links to all sessions/speakers