Add Group Home 3 Test Schedule + Notification description fix

This test schedule matches Fiona’s current work schedule and can be used for “Canned” testing.
The use of “description” as a property in PPRNotification masked the default display method in objective C. It has been renamed to notificationDescription.
“Description” was misspelt in the initialiser method signature.
Merge pull request #31 from davidbernard/test_schedule

Add Group Home 3 Test Schedule + Notification description fix