Cleaned up 'Resampling' and 'Internal'
Okay, we don't really need these benchmarks (at least atm)
Switched to 'StdLabels' everywhere
More cleaning up 'Internal'

  - Moved 'range' and 'reorder' to 'Base'
  - Added labels to 'Matrix_flat' functions
Okay, leaving 'Empirical' until next time