point camera to specific point if target reaches a given finish area

[maiermic]

If the target is moving from a start point (see #32) and moves to a finish area, the camera should point back to the start, when the target reached the destination area.

For example, a skier may ski down a slalom course and take a lift to get back to the start. The camera should track/record every run (without the part of the lift). The course has a given start and finish. The camera should point to the start of the slalom course, track the skier skiing down the course. When the skier reached the finish (range of pan/tilt angles and zoom factor), the camera should wait some time and then point back to the start (see #32).

An advanced example would be multiple skiers that ski down a slalom course one after another and every skier should be recorded. Therefore, the camera has to know, which skier goes first and should be tracked as target. This can be considered another feature.