Improve table of publications design

The existing mainstream publisher tables are cluttered, and the columns aren't optimum for the tasks the tables are used for. User research has highlighted some columns that can be removed or simplified. The main task the table is used for is finding work to do — the key information in this task is document title and last updated date.

* Make titles more prominent and clickable; easily find an item and go directly to its edit page
* Remove the section column; this gets set in Panopticon at creation and is checked by 2i, this can be checked from the document metadata tab and doesn't need to be in the table
* Move slug to beneath the title and use it to link to a preview of the edition. Slug can be useful, but it doesn't need its own column.
* Remove the edit and preview columns and icons
* Make the edition number less prominent
* Use user friendly dates in columns, as recommended by the style guide. Remove the timestamps from the column but leave them there as a title attribute for the few occasions it is needed
* For published documents, link to a locked view of the edit screen.
* Remove the columns for viewing, editing and previewing published documents

There's some repetition in the old templates, this could be DRY'd up. I've opted to do that in a later PR.

# Before
![screen shot 2014-10-17 at 13 44 21](https://cloud.githubusercontent.com/assets/319055/4678869/6bc9e724-55fb-11e4-9cbf-15939e9a091b.png)
![screen shot 2014-10-17 at 13 44 48](https://cloud.githubusercontent.com/assets/319055/4678870/6bcc9276-55fb-11e4-8bc8-0f0b87da9e8b.png)

# After
![screen shot 2014-10-17 at 13 41 53](https://cloud.githubusercontent.com/assets/319055/4678847/2f17df20-55fb-11e4-8e04-976709758f52.png)
![screen shot 2014-10-17 at 13 42 17](https://cloud.githubusercontent.com/assets/319055/4678845/2f170a96-55fb-11e4-9b71-814b0fcfa7c3.png)

## Date title attribute
![screen shot 2014-10-17 at 13 43 02](https://cloud.githubusercontent.com/assets/319055/4678846/2f17d1ba-55fb-11e4-83cc-6f85381e4c79.png)