Updated new functions in eigen_helpers_conversions to properly reference the EigenHelpers types.
Updated new functions in eigen_helpers_conversions to properly reference the EigenHelpers types.

UM-ARM-Lab/arc_utilities,UM-ARM-Lab/arc_utilities,WPI-ARC/arc_utilities,WPI-ARC/arc_utilities,UM-ARM-Lab/arc_utilities,WPI-ARC/arc_utilities