Add a boxMean method used to return the average of the dataset given a
RectangularROI
Merge branch 'gda-8.30' of ssh://dascgitolite@dasc-git.diamond.ac.uk/scisoft/scisoft-core.git into gda-8.30
Get rid of unnecessary class
Fix NPE in profiles
Remove unnecessary condition
GDA-5476: Allow multiple Y axes to be used in the scan plot view 
http://jira.diamond.ac.uk/browse/GDA-5476
Fixed up representation of dataset in jython
Fixed DAWNSCI-593 where calculating hash initialises store but stats do
not get calculated later
Fixed up representation of dataset in jython
Merge branch 'gda-8.30'
Cleaned up some code