[Bf-python] Good old euler problem

[Ken Hughes]

In the post-2.43 release glow, I wanted to float the issue of our 
radian/degree issue in the Mathutils module and elsewhere:

https://projects.blender.org/tracker/index.php?func=detail&aid=3362&group_id=9&atid=264

I really think we should fix this for the next release, and I think the 
best thing to do is implement a fix early in the cycle so that we can be 
sure scripts are converted as necessary.

I think the prevailing decision was to go with radians in the API, not 
just in the Mathutils module.  So should this also be applied to the Ipo 
module (should rotation Ipocurves return real radians instead of the 
degree/10 stuff)?  That's bitten me a few times lately.

Ken