Routing and Login

- Added a RouteConstraint for checking the Role of the user. NOw only
the
users in the role of "Administrator" will be able to access the Admin
area
when the areas are defined in the application. The area route config
will
need to be amended accordingly
- Amended the Login and LoginPartial Pages and implemented the Login
redirection
part in the Account Controller
- When the user successfully logs in the application index page displays
the Welcome <Firstname> <Lastname> message for the user
- Added GLobal Error Resources in the OnlineCatalog web project. All
global
error string will be defined here