Adding add sample log to Elwin

Refs #7711
Merge remote-tracking branch 'origin/master' into bugfix/7711_elwin_temperature_fix
Refs #7711 Added check for whether temp is decreasing.
Merge branch 'bugfix/7711_elwin_temperature_fix' into develop

Refs #7711

Conflicts:
	Code/Mantid/scripts/Inelastic/IndirectDataAnalysis.py