center tree heatmap during initial render

When first rendering a voTreeHeatmapView, Visomics will now pan
and zoom so that the whole item is visible, centered, and fills
the scene.

The voTreeHeatmapView now also automatically adjusts its zoom
level to compensate for the new window size whenever the user
resizes the window.
remove unnecessary #includes
Enable DetectNumericsColumns

This makes our .csv reader create vtkDoubleArray or vtkIntArray
when appropriate.  Otherwise, it would just create vtkStringArray
for every column, no matter what type of data it contains.
bump version number

cutting new installers soon
Merge branch 'tree_auto_zoom'

* tree_auto_zoom:
  bump version number
  Enable DetectNumericsColumns
  remove unnecessary #includes
  center tree heatmap during initial render
Merge branch 'master' of git://visomics.org/visomics