add a user's details page
split the bootstrap css bundle out into a separate bundle
add the ability to edit a user's details
make the title size match the other pages
add the ability to delete users
extract the common styles into a separate file

Both the main site and the admin section share some styles. These are now in a common stylesheet.
add a margin to the page to stop the content disappearing behind the navbar
add a speakers page that shows just the users who have submitted sessions
extract some of the logic out of the controller
Merge branch 'speakers-pages-in-admin-section' into staging

Add a speakers page in the admin section

Conflicts:
	DDDEastAnglia/Areas/Admin/Content/admin.css