New Feature : add Prelist of pipelines

When we have worked on a class of datasetb (larget size, 1Go), we have an idea
of the optimal pipeline, and we just want to investigate the optimal parameters without computing the whole in genetic programm. It would reduce substantially the computation time.

For example:
We can provide a list of pipeline with algorithm names ['LinearSVC', 'RF' ]
We can provide a list of hyper-parameter for each algorithm to search for...

Main goal is to limit the search to those parameters.