Refs #2668 Set offsets to zero in GetDetectorOffsets if Gaussian fit of cross correlation peak is not successful

This should get the windows unit tests passing reliably. Visual Studio compiler optimizations are now turned off in parts of BinaryOperation.cpp. Re #2669.

Fixes #2666: new Progress reporter that prints to the console, for testing. Also, cleaned up the existing Progress class a bit.

Fix for diag script overwriting masks from successive diagnose calls. This will allow them to be combined. Re #1762

Renaming to be consistent with the fact that it is a correction specific to the SNS DAS. Refs #2502.

Fix issues with Load Dialog and file filters. They are now defined by the Facilities extensions + a couple of frequently used others. Fixes #2602

ISIS SANS Batch reduce saves the correct extensions for each algorithm it saves with and save files no longer confirms overwrite when appending re #2604 and #2217

Refs #2012: code to add vectors of MDEvents to a MDGridBox, with tasks and recursive grid splitting.