v2.8.0

New features:

• fromVector for helm2 and helm3: create transformations from translation vectors.
• fromBasisVector for helm2 and helm3: create transformations from basis vectors.
• fromHelmert for plane2 and plane3: create passive transformations from active transformations.
• direction for point2 and point3: get directions between point pairs.
• projectToPlane alias for projectTo in vec2 and vec3
• projectToVector for vec2 and vec3: compute vector projection.
• add origin parameter to transform method of plane2 and plane3: apply helmert to plane at custom point.

Other improvements:

• correct terminology in fromPolar and toPolar methods of vec2 and vec3.
• improve test assertion for vectors.
• upgrade yamdog for better API docs
• small improvements to docs