Vector3Pathway.DrawGizmos should be overridable by subclasses
Removing old sample path behaviors, keeping them as gists

https://gist.github.com/ricardojmendez/88488a8550ea62bfa119
https://gist.github.com/ricardojmendez/f4fff18b34faa0ce17bd
Revert "SteerForPathSimplified was aiming too far ahead"

Oops. That line was *not* aiming too far ahead - I should read my own
comments before doing hasty changes.

This reverts commit ccc702cb67879c69da869726aca4c00fe3c90bd8.
Vector3Pathway, SplinePathway improvements and bugfixes

- Changed calculation for Catmull-Rom points.
- Removed GoKit dependency for debug.
- Moved path data precalculation to its own method.
- Reorganized Vector3Pathway so that properties are grouped.
- Handled case where we're aiming for beyond the path's length.