[sc-dev] [COMMIT] Third Party FFT Target and files

[nikolai collinsky <nikolaicollinsky@xxxxxxxxxxx>]

I added a target for third party FFT stuff as
promised. The PV_ConformalMap got taken out of James'
FFT _UGens target and FFT.sc class file. 

Convolution and PV_ConformalMap now in the new target
(and I added a Convolution help file- will try and
optimise the UGen more at some point). I've made the
new target multi .cpp file with a header for common PV
code so it's easy for others to include their stuff in
there too.

hope I didn't break anything or surprise anyone- also
moved FFT.help files to a new FFT directory. 

I'll also be using this target to eventually add the
FFT feature detectors I've been working on if OK with
all. 

Please advise any problems, errors.
N

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