[ZD#364911] Adjusts search endpoint after 37signals deprecation(?) to use /people/search.xml

This unfortunately removes the ability to do a global search across a Highrise account
Clean up fmt for search result links
More clean up fmt for search result links
Merge pull request #1 from zendesk/jake/fixsearch

[ZD#364911] Adjusts search endpoint after 37signals deprecation(?) to use /people/search.xml