Switch from affine transforms to filters.

--CAR
Add record saving to file and loading.

We dump to a .real and .imag file.  The format is

recordsLength (int32), numWaveforms (int32), numSegments (int32), data
(single), data(single), ...
Don't rescan noise quadrature integration time

--CAR
Assume row vector optimal filter

--CAR
Bug-fix final decimation stage

Previous approach assumed integral decimation.

Need better way to set the decimation factor.

--CAR
Merge branch 'develop' of github.com:BBN-Q/Qlab into develop