uses lookup table for twiddle factors
uses lookup table for twiddle factors

'make test' output: (Elapsed time is inflated, realplayer was running at time)

### testing SNR for  1024 point FFTs
#### DOUBLE
snr_t2f = 295.41
snr_f2t = 307.88
#### FLOAT
snr_t2f = 144.63
snr_f2t = 143.48
#### SHORT
snr_t2f = -30.111
snr_f2t = -61.637

#### timing 10000 x 1024 point FFTs
#### DOUBLE
Elapsed:0:25.19 user:20.22 sys:0.30
#### FLOAT
Elapsed:0:07.16 user:6.00 sys:0.09
#### SHORT
Elapsed:0:05.89 user:4.66 sys:0.11

itdaniher/kissfft,itdaniher/kissfft,itdaniher/kissfft,itdaniher/kissfft