Design and implement a better scene cut algorithm

[luziferius]

The program currently uses a simple greedy algorithm to merge detected scenes, if they are below the minimum scene length, as given by the command line argument.

It takes a scene and merges the following scenes as long as the combined length is below the minimum length.
The algorithm has some downsides. It may overshoot the maximum scene length. It does not take the scene cut score into account, so may produce false positives.

TODO: Fill additional information about a new approach here