Re #9579. Added usage section to SplineBackground
Re #9579. Added Usage section to ChangeBinOffset doc
Re #9579. Added usage section for LoadRaw
Re #9579. Added usage for MaskDetectors
Re #9579. Defined property type string for a vector<size_t>
Re #9579. Added Max usage section.
Merge branch 'master' into feature/9579_check_documentation
Re #9579. Done pages for GroupDetectors versions 1 and 2.
Re #9579. Forgot the usage data include.
Re #9579. Finished page for Integration.
Re #9579. Added Usage to SaveNexus
Re #9579. Added Usage section to SaveCSV.

Added a correction to the mantid docs sphinx extension to deal with nonprintable characters in algorithm properties.
Re #9579. Replaced static file with generated one in GroupDetectors.
Re #9579. Forgot to change an example.
Re #9579. Added Usage section for MaskWorkspaceToCalFile.
Re #9579. Added Usage section to SaveIsawPeaks
Re #9579. Usage section for MultiplyRange algorithm
Re #9579. Usage section for ElasticWindow.
Re #9579. RealFFT description and usage example.
Re #9579. Usage example for GetDetectorOffsets.