Add "home" to demo mission
Prevent editing of the 0 waypoint
Display "Home" label for 0 waypoint
Adjust demo "home" location
Modify annotation title and coloring
Draw a primitive home icon for wp 0
Modify loiter icon

 - show a circular arrow around the loiter icon
 - use the same color as regular waypoint icons
Replace assert with NSAssert
Merge branch 'IGCS-167-apm-home'