option case class => case object (forgot tests)
Move filtering backend functions from breeze.signal.filter._ to breeze.signal.support._
(name conflict with function breeze.signal.filter(...) )
filter functions
firwin and FilterKernels made generic to accomodate integer DSP
cosmetic
make Int convolution use Long intermediate values
Filter DenseVector[Int] with Int kernel
option name change OptKernelType => OptKernelDesign
some corrections