[imp] fast associated items management & use jlayouts to render them

Issue tracker item:

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=30982
## Testing
### Enviroment

* Install aditional any aditional language through:
<code>Extension > Language Manager > Install Language</code>
* In the plugin manager enable the plugin
<code>System - Language Filter</code> and in the plugin <code>Basic options</code> enable <code>Item associations</code>
* Now for each type of content you will need to create one item for each language and link them through the <code>Associations</code> tab.

### Required tests

* [ ] **Content article list** in backend should show links to associated items and click in them should open them in edit mode.
* [ ] **Content category list** in backend should show links to associated items and click in them should open them in edit mode.
* [ ] **Contact list** in backend should show links to associated items and click in them should open them in edit mode.
* [ ] **Newsfeed list** in backend should show links to associated items and click in them should open them in edit mode.
* [ ] **Menu item list** in backend should show links to associated items and click in them should open them in edit mode.
* [ ] Run same test in both **Isis** and **Hathor** backend templates