BLIX-15: ScanDataSetProcessor.py does not handle multiple peaks data returned as a list of XYDataSetResults
manual merged from 8.36 to 8.38, but not to master yet.
http://jira.diamond.ac.uk/browse/BLIX-15
BLIX-127: make scan data process return the centre of FWHM of a peak
add object method getCFHW() to retrieve the property after data analysis
http://jira.diamond.ac.uk/browse/BLIX-127