Minor changes.
Merge remote-tracking branch 'origin/master'
Some improvements on ring buffer implementation.
Added a warning in FFT implementation for later fix.
Merge remote-tracking branch 'origin/master'
Introduced CSDRRealArray and CSDRComplexArray to avoid NSData and a lot of casts to float *.
Replaced some of the FFT routines with vDSP-versions.
Other smaller changes.