This update lets templates adjust their rendering context when including other templates, such as changing language settings for a specific included section. It also removes an older template cache path so the correct context is consistently used when loading and rendering views.

- Removed cache from ir.qweb
- Added t-context attribute on t-call that updates the context used for the rendering.

eg:

``` xml
<t t-call="foobar" t-context=" { 'lang': new_language } "/>
```

Forum posts and answers can now automatically mark links from lower-karma users so search engines do not reward spam. This helps protect the website's search reputation while allowing trusted contributors to post normal links once they meet the karma threshold.

... user have karma more than karma_nofollow then don't add meta tag.
- Task: https://www.odoo.com/web#id=9429&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.VpEnCuXbjsfGEatU