Upgrading to new pipeline

The tiniest first step to move towards the new pipeline.

Step 1: Changing the pipeline topology. [IN PROGRESS]

Step 2: Changing the pipeline metadata

Step 3: Update only the algorithms, and not a combination of data objects/algorithms.

Step 4: (VTK 6 only): Subclass only from vtkAlgorithm and use the RequestXXXX api