v6.59.0. Bugfix.

- v6.59.0 December 19, 2013
	- Removed the previously deprecated `ensureFile`, `ensureDocument`, `ensureModel`/`ensureFileOrDocument` methods, use `addFile`, `addDocument`, and `addModel` instead
	- Improved watching, should hopefully fix [#738](https://github.com/bevry/docpad/issues/738), [#742](https://github.com/bevry/docpad/issues/742), [#739](https://github.com/bevry/docpad/issues/739)
	- Updated dependencies