Template fixes and improvements

* Fix duplicate columns
* Set status as cell CSS class across the board for status colors
* Table column widths fixes all around
* Follow Oozie's naming conventions for coordinator materializations
* Fix whitespace issues, wording and typos
* Add coordinator status to coordinator show page

Signed-off-by: Maxime Petazzoni <mpetazzoni@turn.com>
Merge pull request #4 from turn/master

Display coordinator status in coordinator show page (and whitespace fixes)