Using butterworth filter for smoothing and ConvertToMatrixWorkspace to save memory on output. Refs #1878.

Modified the code to work around a problem with the event workspace being divided by another event workspace. Also put in hooks for having different bank numbers for each frequency/wavelength. Refs #1878.

First generation of the backend. The automatically generated gui may be good enough for a long time. Refs #1878.

Adding python algorithm that uses local sns findnexus python library. This will not work offsite. Fixes #1710.

Fury - added Plot Input option, added support for multiple files.

Slice - linked the second time range options to the checkbox to automatically enable/disable them. adjusted the way that slice handles a second time range to use FlatBackground rather than Minus algorithm, taking default values for time ranges from the analyser/reflection parameter file.

Elwin - added second energy range a la slice, added support for multiple files, added Plot Input button

re #1529 - rearranging PythonAPI/PythonAlgorithms and adjusting Win installer handling of python algorithms

unable to test locally because of obscure wix errors, apologies if this breaks stuff

re #1508 - adding interface for Fury, Elwin, Slice, MSDFit and Absorption stages of Indirect analysis steps extrapolated from Spencer Howell's scripts.