[Bf-python] Python API patch for IPO texture channels

[Ken Hughes]

I've uploaded the patch for accessing IPO texture channels from
Python.  This technique still uses strings to define the curve
names (not dictionaries as we've been discussing).  It also
incoporates the earlier delBezier() and delCurve() patch.

I see Stephen has started creating a wiki for the IPO methods
discussion, although I haven't figured out what to do with it
yet (or how to post to it).  So I'll sit back until we figure
out what to do with these patches, and where to go from there.

Thanks -- Ken