SatDump

This release now uses white balance (Algorithm used by GIMP) for MODIS composites, and fixes up Oceansat-2 decoding on (very) large passes.

MODIS, VIIRS and MERSI now are BowTie-corrected for better results

Small oversight when I ported over the new DSP system...

size_t has been dropped in favor of uint64_t in demods to allow progress to work as expected on much lager files.

Properly scale i16 to (hopefully?) support a wider range of formats.

Input symbols are now scaled down to roughly [-1, 1] before passing through the AGC, avoiding clock recovery issues.

I forgot to flush the buffer and correctly handle progress migrating to the new demod. Fixed now!

Windows build update, to include latest fixes such as LRPT's.

Falcon, SMAP, Aqua & Terra, LRPT, DSB and all HRPT processing tested to work properly on Windows.
Live processing disabled for now.

Here's the first apparently reliable build of SatDump made with MSVC, it seems to mostly work but bugs are to be expected... And I'm looking for them so please open an issue if you encounter any!