Refs #8889. Add the documentation.

Code/Mantid/Framework/WorkflowAlgorithms/src/MuonLoad.cpp

@@ -1,5 +1,13 @@
 /*WIKI*
-TODO: Enter a full wiki-markup description of your algorithm here. You can then use the Build/wiki_maker.py script to generate your full wiki page.
+The algorithm replicates the sequence of actions undertaken by MuonAnalysis in order to produce a Muon workspace ready for fitting.
+
+Specifically:
+# Load the specified filename
+# Apply dead time correction
+# Group the workspace
+# Offset, crop and rebin the workspace
+# If the loaded data is multi-period - apply the specified operation to specified periods to get a single data set.
+# Use [[MuonCalculateAsymmetry]] to get the resulting workspace.
 *WIKI*/
 
 #include "MantidWorkflowAlgorithms/MuonLoad.h"