initial commit of single pole digital filter
adding simple makefile and framework for fixed point routines
first cut moving all digital filter code to separate file
removing all filter processing from driver main()
commenting filter routine
being more specific about the filter prototype
commenting main routine
adding comments to octave scripts
adding simple print/plot of filter input and output in octave
add README
minor fxp changes, print out -3dB close up
using MIT license
adding markdown from github README