Allow for instrument resolution in specular calculations
|Status:||Resolved||Start date:||15 Jan 2018|
|Target version:||Sprint 36|
Incident beam can have a distribution in wavelength and incident angle, which should be accounted for in calculations. Having non-zero wavelength and incident angle spread means that convolution of the intensity from a delta-distributed beam (which is calculated now) should be convolved with specified angular and wavelength distributions.