Added status and displayStatus properties to FixtureModel

AFDP-99
Created Callback, NotificationCenter, and FixtureStatusEventHandler

AFDP-99
Added status display and event handling to the Manual Enroll view

AFDP-99
Added a FixtureStatus enum to the Fixture domain object.  Updated
the fixture model to reference it.  Updated the add fixture command
to properly set it.  Fixed broken tests.

AFDP-99
Got most of the functional tests working.  The last remaining failing
test will be resolved when server support is added and the javascript
stubbed-in behavior is removed.

AFDP-99
Removed the timer-based test "event" that would update the status
of new fixtures.

All functional tests pass now.

AFDP-99
Defined API for notification, notification center, and listener.

AFDP-100
Updated springframework.version to 4.0.0.M1 and added spring-websocket

AFDP-100
Changed Notification API and wrote basic center implementation.

Updated the notification center and listener APIs to remove tracking
of the last notification ID (as unneeded most of the time and
unavailable in those few cases where it might be useful).  Wrote
integration tests to exercise new basic implementation of the
notification center.

AFDP-100
Added expectation to javadoc that Notification must be object-mappable

AFDP-100
Added com.fasterxml.jackson.core dependency required for SockJS

AFDP-100
Implemented SockJS endpoint and NotificationListener

AFDP-100
Added SockJS Javascript library and Spring wiring

AFDP-100
Added unit tests for the notification endpoint and listener.

AFDP-100
Updated notification to have a timestamp instead of an ID.

AFDP-101
Created a command to update a fixture's status.

AFDP-101
Created an abstract notification implementation.

AFDP-101
Implemented a status change notification.

AFDP-101
Changed the status change notification fields and renamed it.

AFDP-101
Added missing package info.