[RFR] Introduce edit-button and delete-button directives

- [x] Introduce edit-button and delete-button directives
- [ ] ~~add reference-link directive~~
- [x] add `view.listActions(['edit', 'delete']) helper
- [x] update documentation

Refs #121
You can :
- Set a name to the field, so it will erase the previous one one the view
- Change to name to indicate that a new column will be created