Add wiki.  Refs #6994.
Correct typo in FilterEvents description re #6994

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Use non-deprecated algorithm for GetMaskedDetectors re #6994

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Improve formating in description of PredictFractionalPeaks re #6994

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Changes to LoadSassena and StepScan for wikimaker re #6994

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
LoadEmptyInstrument, move info from summary to description re #6994

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Merge branch 'feature/6994_wikimaker' into develop