Merge pull request #1 from angular-ui/master

Further tidyup on the ngDoc now I can see it on ui-grid.info.  Mostly minor wording changes, and changes to the way I'd defined the names so that they sort properly (I'd defined some fully qualified and some not).

Also removed the (optional) on many properties, seems like they're mostly optional, so I've instead marked those that are mandatory with (mandatory)