Merge branch 'master' into next
Under extreme circumstances, optfir might never produce an answer (atten>300), so this puts in a check on the ripple; if it gets too large, stop trying.
Allowing PFB interpolator to be called without specifying the taps; autogen taps inside hierblock.
Allowing PFB decimator to be called without specifying the taps; autogen taps inside hierblock.
PFB channelizer can be specified without external taps. Uses optfir to generate an internal filter to cover the channel bandwidth; user can specify the attenuation of this filter if desired.
Updating the arb. resampler to use the optfir filter that provides better specificatiion of stopband atten.