Responsive tweaks to com_languages

At the moment com_languages aren't presented very nice on small viewports. I've added a few class="hidden-phone" to the table elements:

![old](https://cloud.githubusercontent.com/assets/1738811/3562584/70c1a93c-09f8-11e4-9d87-fae3c265c57a.png)

vs.

![new](https://cloud.githubusercontent.com/assets/1738811/3562583/70ae7eca-09f8-11e4-9af1-e297719e4050.png)
 
The elements which are hidden on small viewports are: version, date, author and author email