[Bf-python] Making IK flag writable in the Bone class

[Jonas Petersen]

Stephen Swaney schrieb:

>Jonas Petersen wrote:
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>>I modified  python/api2_2x/Bone.c so the flag can be modified via python.
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>>For now I did it by adding an optional bool parameter to the hasIK()
>>function that sets/unsets the flag.
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>>From an API point of view,  I really, REALLY dislike the idea
>of overloading a query function to set and unset a flag.
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Me too :)

But it's done like this in other places as well. So I thought it would 
be ok. Check out NMesh for example. It has 3 "has*" functions, which all 
have an optional parameter to set the flag.