* Adding overflow hits
	* Tagged as TrkTrackSummary-00-23-07

2014-11-14 Nick Styles
	* Adding method to return hit pattern
	* Tagged as TrkTrackSummary-00-23-06

2014-10-23 Nick Styles
	* Synchronising with xAOD::TrackSummary
	* Tagged as TrkTrackSummary-00-23-05

2013-10-09 Nick Styles
	* New enums in summary for innermost/next-to-inner most pixel layers (to replace blayer hits)
	* tagged as TrkTrackSummary-00-23-04