--------------------
- Added `extra_include=linked_items` available on item.
This will append the item linked items, various `modes` may be asked:
`auto` (by default) will return every auto linked items, `manual` will return
manually linked items, `predecessor` will return the first predecessor,
`predecessors` will return every predecessors, `successors` will return the
direct `successors` and `every_successors` will return chain of successors.
[gbastien]
- Added `utils.filter_data` that will let filter given data.
[gbastien]
- Renamed `BaseSerializeToJson._get_param` to `BaseSerializeToJson.get_param`
or it is considered as a private method not to use directly but actually
it must be used instead `utils.get_param`.
[gbastien]