Direction way

[ManevilleF]

Problem to solve

The current direction_to and diagonal_to methods can produce inaccurate results, as sometimes there is a Tie between two directions.
As a consequence, the corner_wedge produces some inaccuracies.

Solution

Added a DirectionalWay enum which can represent both a single direction and a tie and two new methods:

• Hex::way_to
• Hex::diagonal_way_to

This type can be unwraped to a single direction, and compared with directions directly

[alice-i-cecile]

Makes sense: I ran into this when trying to figure out how to rotate my ants.