LSS Zone 1.1.1 beta

New Features
- floor, ceiling and walls cumulative area now present inside
'Properties' dialog
- supressing units in a model affects all data with units (labels, zone
lists, properties representation)

Fixes
- 'puts' method removed from loops (it caused SU hang)
- 'selection.each' replaced with 'selection.to_a.each' (it was made for
forward compatibility with SU2014)
- error in 'Attach Labels' dialog fixed (appeared in a model with feet
and inches and some length value in a label)