3.0 - Paginator templates part 2

This is the second set of change for converting PaginatorHelper to use template strings instead of option-itis to generate HTML. I've converted all of the methods except link() to use templates. I've got a few open questions/todo's left, and any feedback you folks have on them or the changes in general would be great.

### TODO

* [x] Better HTML for the `ellipsis` and `separator` elements.
* [x] Is `separator` useful given how modern CSS frameworks handle pagination CSS. Looking at both bootstrap and zurb makes me think this element is totally useless now.
* [x] Does link() need to exist at all anymore?
* [x] Address missing model parameter in various methods.