StudioPress Genesis Framework 3.5.0

### Added
* Added menu support to onboarding process.
* Added featured image support to onboarding process.
* Added support for assigning static Posts page to onboarding process.
* Added post excerpt support to onboarding process.
* Added dynamic support for child theme constants.
* Added support for importing specified settings on theme activation via a config file.
* Added functions to get, set, and delete settings that eventually expire.

### Changed
* Improved the onboarding process for screen readers.
* Update Superfish to 1.7.10.
* Changed references of "Front Page" to "Homepage" where appropriate.
* Use the post type's label as linked text in the metabox on CPT archive settings.
* Changed the Genesis update storage to an expiring setting rather than a transient.

### Removed
* Removed several Grunt dev tools and replaced with node scripts.
* Removed sitemap from 404 template (performance and security).

- Fixed `genesis_human_time_diff()` to display accurate relative dates.
- Fixed a problem with `aria-hidden` and `tabindex` attributes were being escaped, causing the quotes to be unintentionally encoded.

### Added
- Add a `genesis_get_config()` function, to locate and load config files from Genesis and a child theme.
- Add a new "onboarding" feature that allows users to import homepage demo content in WordPress 5.0.
- Add a new function that allows you to get an author box by specified user.

### Changed
- Improved/clarified the labels on settings/customizer pages.
- Changed references of "- None -" to "None" in forms, for better accessibility.