Refs #8534. AsymmetryCalc: set correct Y unit label.

No need to do that manually in MuonAnalysis.
Refs #8534. RemoveExpDecay: set correct Y Unit Label.

No need to do that in MuonAnalysis.
Refs #8534. Files for new MuonCalculateAsymmetry algorithm.
Refs #8534. Options declaration, simplest functionality.
Refs #8534. Two-period functionality.
Refs #8534. GroupAsymmetry option support.
Refs #8534. PairAsymmetry calculation.
Refs #8534. MuonCalculateAsymmetry: documentation.
Refs #8534. Merge remote-tracking branch 'origin/master' into feature/8534_muon_new_workflow_alg
Merge branch 'feature/8534_muon_new_workflow_alg' into develop

Conflicts:
	Code/Mantid/MantidQt/CustomInterfaces/src/MuonAnalysis.cpp