* Using shorter itertools doc recipe for [re]grouping input roi parameters
* Fixed remaining WAttribute.get_write_value bug in BackgroundSubstraction
Merge remote branch 'origin/master'

Conflicts:
	plugins/RoiCounter.py
* Reorganised and extended RoiCounter & Roi2Spectrum SoftOps:
  + Unified interface for named rois
  + Added methods for retreiving configured RoIs (including ARC)
  + Renamed methods to improve uniformity in nomenclature
* Added Simulator Tango Device Class with the new configurable parameters