Add About DDD East Anglia page.

Add a new controller action to the Home controller, and an associated View
with some basic markup and content. Include some basic styling of the page
as well, nabbing the fixed menu from here:
http://twitter.github.io/bootstrap/base-css.html
Add link to About DDD page in nav bar.
Flesh out the About DDD page a bit more.

Address the submission questions mentioned by @cerishaw on #39. Voting
is yet to be tackled...

Also comment out the sidenav items (using a Razor comment so nothing is
sent to the browser).
Remove extra styling for About DDD page.

The sidenav items aren't needed yet and can be added later in a different
change.
Remove Voting section and links to it.
Add a section on the DDD "process".

Describe the process of DDD events for people new to them. I.e.,
sessions are submitted by the community, voted on by the community, and
we favour new and local speakers.
Fix display width of the About page content.

This was displaying in 3/4 of the available space, so use all the
available space instead.
Add the date of the first ever DDD event.
Reduce the usage of the semicolon.

I've left them in the final paragraph, because it seems the most correct
punctuation here. That is, there's a list of things, and one or more
items in that list are themselves lists. As such, the comma can't be
used throughout.
Put the word "softer" in quotation marks.
Remove commas after i.e.

Apparently this is the British English standard.
http://english.stackexchange.com/questions/6894/should-there-be-a-comma-after-i-e
Remove another stray comma.
Complete a half-finished sentence.

Describe that demos and code samples are good inclusions for a session,
and that we are interested in new session formats as well as the
well-trodden ones.
Merge pull request #65 from alastairs/about-ddd

Fix #39: Create a page explaining the DDD process to new users