workflow_ng 5.x-1.0-beta5

#156428 patch by jeevesbond: added a condition for checking user roles and actions to add/remove user roles
#164522: removed the possiblity to let workflow-ng handle saving user objects, as it isn't possible to do it clean,
user role actions: made selecting at lest one role required, clean the checkboxes value
#164522: removed the possiblity to let workflow-ng handle saving user objects, as it isn't possible to do it clean,
user role actions: made selecting at lest one role required, clean the checkboxes value

for developers:
ad #164522 removed the possiblity to let workflow-ng handle saving user objects, as it isn't possible to do it clean:
So if you modify a user object in an action, you need to save the changes yourself now!