v6.62.0. Improvement.

- v6.62.0 January 28, 2014
	- Stylesheets are more effeciently generated
		- Files with the `outExtension: 'css'` are now the only ones included
in the `stylesheet` collection
		- Stylesheets no longer have `referencesOthers` to `true` on them by
default, this is now left up to plugin authors to do
		- Thanks to [Dimitar Kolev-Dick](https://github.com/dimitarkolev) for
[issue #789](https://github.com/bevry/docpad/issues/789)