Setup the database for cross-record multisearch using PgSearch.
Add search page, required controller actions. Only first_name atm.
Make the search view the homepage.
Search form can handle searching on multiple fields.
Searcher#multi_search generic enough to work with other models.
It is possible to search on addresses.
Can search on phone numbers, other address fields.
Merge branch '3_redux_separate_search_feature'