Update documentation.

The documentation now contains the default for
vtkDelimitedTextReader::HaveHeaders (false).

Change-Id: Ie97f17d427d92243e710a0d6b85d8f6ffc67a6ea
Remove debugging printouts.

Change-Id: I92102c8ac0609f80308f6954f6bc89aabf42e963
Merge topic 'ensemble-reader' into master

1d7c4549 Remove debugging printouts.
9ac19b71 Update documentation.