Added parallel option to distance kernel generation
Added parallel option to distance kernel generation

Using internal parallel map iterator.

Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK