[PR] Add support for University Center Objects

As sites begin using the [University Center Objects plugin](https://github.com/washingtonstateuniversity/WSUWP-Plugin-University-Center/), we should provide some default layouts that take advantage of the existing Spine structure.

Rather than expanding the current `index.php` template, etc... to fit, I'm creating templates that are specific to the plugin. These should be considered very unstable. HTML markup can change at any time.