add a contour and a templated pv explorer
flesh out the paraview adapter's color engine

the argument that changes is a name
that name is an index into a dict that has either a solid color
or a lookup table
rename UpdatePipeline to Run and demonstrate an idea

UpdatePipeline was inherited from data_exploration.py and makes
less sense here than Run does.
Add a demonstration of a 'directory'less argument.
Merge remote-tracking branch 'dave-github/master' into api-updates

* dave-github/master:
  rename UpdatePipeline to Run and demonstrate an idea
  flesh out the paraview adapter's color engine
  add a contour and a templated pv explorer

Conflicts:
	explorers.py
	pv_explorers.py
	tests.py
Updating all new code after merge to use the newer API