Fix rotation/alignment issues in text. Ref #503

VTK has some oddball quirks for backwards compatibility -- this is one of
them. In a nutshell:

vtkTextProperty::SetOrientation: Rotates the text in the texture produced
by the text-rendering backend in VTK.

vtkTextActor::SetOrientation: Rotates the texture around the anchor point.

So previously the text was rendered at an angle to an oversized
rectangular texture, which was then aligned to the anchor-point, leading
to the unexpected results.
Merge branch 'master' into 503-text-align
new baselines png
Merge pull request #770 from UV-CDAT/503-text-align

Fix rotation/alignment issues in text. Ref #503
ok new files look good, thanks @dlonie approving merge