workflow engine update (using the new format of configuration)
Merge branch 'adding_roles_to_models' of https://github.com/david-allen-tessella/s2_extraction_pipeline into workflow_refactoring

Conflicts:
	app/scripts/workflow_engine.js
Commit prior to merge
Ben's changes merged in
getTube renamed to getTubeFromModel. Functionality has changed: it now checks for the tube within the model's selection of tubes as opposed to checking S2
Changed getSpinColumn method to getSpinColumnFromModel. Changed row_presenter model setup
upgrading kit_model/_presenter to work with new workflow
Committing prior to merge
Merge branch 'workflow_refactoring' of http://github.com/benoitmangili/s2_extraction_pipeline into adding_roles_to_models

Conflicts:
	app/scripts/models/kit_binding_model.js
	app/scripts/presenters/kit_binding_page_presenter.js
Edited init method in kit presenter so that it takes data from the workflow