ENH: DelimitedTextReader supports string input.

Enable vtkDelimitedTextReader to take a text string as
the input.

Change-Id: I3d9b8dd0db9dfcd5afd9a6f4bbdc06accd942d94
Merge topic 'DelimitedTextReaderAcceptStringInput' into master

ade77513 ENH: DelimitedTextReader supports string input.
fix failing RCalculator tests

This commit resolves some issues that lingered after 5bd3962.
There were still a few spots in vtkRAdapter where we compensated
for an extra root node.  This is now fixed.  The tree tests in
this module also had to be updated now that VTK trees & R trees
contain the same number of vertices and edges.

Change-Id: I624c6e23b08146f91d3141aded8ccf380d9f6538
Merge topic 'fix_r_tests' into master

ca924e77 fix failing RCalculator tests
Fix gcc -Wliteral-suffix warning

Merged fix from upsteam HDF5.  Trivial fix that adds extra
space.

Change-Id: I13f545963cae96d4dd808bc21a8131166dd14041
Merge topic 'hdf-warning-fix' into master

eda5e1ab Fix gcc -Wliteral-suffix warning