Added new broadcast iterator and unit tests
Moved logging message to prevent an NPE
Minor correction of comment
Converted more methods to use dataset factory
Removed unused import
Attempted partial fix to http://jira.diamond.ac.uk/browse/SCI-1634
Merge branch 'master' of ssh://dascgitolite@dasc-git.diamond.ac.uk/scisoft/scisoft-core.git
Removed base implementation of sort
Moved another method down to subclasses