Functions.php cleanup.

* Breaks out contents of functions.php into other includes.
* Removes homepage blurb selector function and filter.
* Removes user meta stuff, since we have a whole 'nother post type for that kind
  of stuff.
* Removes function to get users ordered by any meta key.
* Renames a bunch of functions for consistency.
* Removes shortcode for listing people.
This is getting annoying.