stop hardcoding gadget url
export a class_definition so that we can edit edges properties
remove junk file
update to new jsplumb gadget from DREAM (without patches)
apply ERP5 patches to jsplumb graph editor:

- declare a service
- use jquery ui dialog instead of jquery mobile
- use erp5 data format for render / getContent
renderjs, rsvp or jio does cannot be included twice in the page. remove them for now.
edit business link documents from the graph data