Added require so I can get rid of my winow functions and use DSP's
Moved resamplers to new file
Restructured package to use DSP's windows, and to be more modular
changed φCurrent to currentphase to better match function name
New methods of outputlength() that take a filter object and input length
Refactored resamplers to use new outputlength methods
Now scaling filter taps by interpolation to account for interpolation's negative gain
Fixed problem with named parameter
Changed example, since multirate filters now scale taps by interpolation.
Changed require because of a warning