Rework pitch detection: To improve separation between pos and neg moves the history memory is now evaluated starting from the last detected start condition. This was needed because a small "overshoot" of the end position causes e.g. a pos event to be detected as negative event.

Heinrichs Weikamp OSTC4 update files.

The builds are for testing purposes only. Be careful, they might not work and are definitely not recommended for real dives.