Calib postprocessing of large system matrices with limited RAM

[jusack]

To apply calib postprocessing to a system matrix the complete data needs to be loaded to RAM.
Ideally we can find a way to do it sequentially over the frames without requiring the full data to be loaded.

Additionally it could be possible to directly include an option for frequency filtering to reduce the processed file size (most likely only by static parameters like min, max, stopBands and mixingOrders)