Use Bezier instead of Splines (or add as an option)

What steps will reproduce the problem?
1. Creating a path

What is the expected output? What do you see instead?
I am making a cutscene, think any typical Halo-style cutscene where a 
helicopter/plane/etc has to follow a path.  It is much much much easier to 
create paths using bezier curves than it is splines.  I actually found the link 
to the script for bezier-flythrough-paths in your itween.cs file:
http://forum.unity3d.com/viewtopic.php?p=218400#218400

What version of the product are you using? On what operating system?
2.0.33

Please provide any additional information below.
I can understand the uses for both kinds of curves, so in the next version it 
would be great to tell the path what kind of curve you want.

Also, it would be great if you didnt have to manually input each waypoint, like 
in SplineController.cs, where the spline simply reads in the gameobject where 
you are holding the waypoints.

Original issue reported on code.google.com by chud...@gmail.com on 24 Nov 2010 at 12:58

johnatm / itween

Use Bezier instead of Splines (or add as an option) #49