call scripts by their old name

they don't require another bt to be installed and they are here for this purpose

ERP5Workflow: add acquire_permission_list attribute, setup acquisition of permission/roles correctly when converting, rename methods

and remove state_permission_roles property

it should not be required to have destination list on a state

WIP
todo: remove property in property sheet
persistent mapping will take care of changes on the dict and commit them in the ZODB
otherwise, because we change the attributes of the dict and not of the State object,
the changes will be lost

during workflow conversion, when original workflow permission_roles is
None

state_permission_roles attributes should be updated when the permission list is changed on the workflow
it also fix matrixbox edition (was crashing when permissions where added)

+ remove unused dependencies

instead of re-coding the wheel

because they are related to the cells

remove custom methods or rename them to start with _ not to be confused with API methods
+ add first prototype of mixinCustomStorageMatrixMixin

data structure state_permission_roles

this avoid to create a big amount of objects for each state of each workflow

when converting workflow

move "view_graph" view from erp5_workflow bt5 to erp5_graph_editor

after calling this script, positions of the states will be chosen by jsplumb
and manually saved positions will be erased

+ separate python script from XML