New turn/keep, gray zone and overlapping angles.

[FZ69617]

Key changes:

• Turn/keep angle set to 45.04 degrees as specified in Wiki.
• Gray zone angle set to 0 - i.e. effectively disabled.
• Overlapping angle set to 0.5 degrees based on experiments on the map.

Other changes:

• Two and three overlapping segments logic replaced with a single generalized algorithm.
• Some minor code cleanups.

All above changes have been introduced based on my experiments on the map. However, we need further testing in order to ensure correctness of these changes - especially, I'm not really sure whether a "gray zone" can safely be disabled.

[FZ69617]

Below are just a few of map experiments performed by me in order to verify proposed values.

Overlapping angle guess: https://www.waze.com/pl/editor/?env=row&lon=15.49936&lat=51.88382&layers=452&zoom=8&segments=279263298,279347932

As you can see 0.5 is just my guess - there are still a lot of other possibilities. :) I'll prepare other tests in order to find better approximation here.

Generalized overlapping algorithm basis: https://www.waze.com/pl/editor/?env=row&lon=15.50140&lat=51.88435&layers=452&zoom=6&segments=279348386,279348858,279348822

The client app., WME Route Checker and LiveMap suggestions are inline with above JAI estimations, but I think we are still just a bit closer to the angles used by real Waze algorithms. :)