The package is available on the Asset Store: https://www.assetstore.unity3d.com/#/content/10236
What changed in version 1.3:
- Updated scripts and shaders to be 100% compatible with Unity 5
- Added custom shaders to blend between 2 colors depending of the length of the spline
- Fixed some rare cases of out of range exceptions
Note that the Web Player doesn't work on Chrome anymore since they disabled the Unity plugin, and all NPAPI. You can either manually re-enable NPAPI, or use an other browser to see the demo.
For any questions or comments, come see us on the Unity forums!