hpicgs/gloperate — pull request #20 by scheibel (2014-09-24 12:47:47+00:00)
Title: Pipelines

* add pipeline and stage classes
* stages have inputs and outputs
* stage inputs are connected to other stages outputs or external data
* stages are sorted by their dependency graph
* stages are determined to be executed whether their inputs have changed or they should be executed every time
* add generic pipeline painter superclass
* no template pipeline painter on purpose
* add example painter using a pipeline