remove an unused style sheet
add track information to the conferences table
add track information to the conference
remove a leftover from before we introduced ninject
get the total number of sessions from the database
fix the binding problems
add some default values to the database for the new fields
fix the tests
use the extension helper method to get hold of the view models
extract builders out of the tests
add a test for the new logic
Fix some broken tests
Merge branch 'adrianbanks:number-of-sessions' into staging

Fix #289 Use the correct number of sessions for the conference

Conflicts:
	DDDEastAnglia/Areas/Admin/Views/Session/Index.cshtml