[views] NotFound: re-style
GCAAuth: use NotFound view for NotFound
[views] template: Add Home icon& only submission if isOpen
[views] template: replace if (conference.isDefined) with map
[views] template: also use map for account.isDefined
[views] template: Change logout into context-aware dropdown
[views] template: Add change password to dropdown
Merge pull request #97 from gicmo/navBar

Navbar style changes: Add home button and drop-down menu for logged-in user