fix TestEmptyInput for vtkDelimitedTextReader

Return early if this class is supposed to read from a file
and no file name has been set.

Change-Id: I84457c57893a851ee5917436cf50aa8a24ff8218
Fixed glsl compilation error on OS X 10.9

Renamed 'step' variable, which seems to conflict
with built-in step function, resulting in compilation
error on RogueResearch6 dashboard (OS X 10.9).

Change-Id: Ibee90a9ef3e86d9731103c01d04c23e154f70d07
Merge topic 'DelimitedTextReader_EmptyInput' into master

5e494022 fix TestEmptyInput for vtkDelimitedTextReader
Merge topic 'glsl-reserved' into master

1ce7c91d Fixed glsl compilation error on OS X 10.9
Introduce Bag Plot and HDR statistic filter.

Add a new type of plot to draw 'bag plots', a bivariate generalization
of the univariate boxplot.
Add a new statistic filter to compute the Highest Density Regions
that can be used to compute a density field used to draw the bag plot.

Add support for the case where the bag is reduced to 2 points.

Change-Id: I16852a46bacc3d74a72c001114cef9b287765c9d
Merge topic 'BagPlotAndHDRFilter' into master

5693f023 Introduce Bag Plot and HDR statistic filter.