Implementation of the new people search.
Database table f3a_infonid has new column person_order
Little search optimization.
Now using search queue for asynchronous searching.
Bug: Section header sometimes double.
Bug fix: Duplicate section headers in search-mode in iOS 8 removed.
Final optimizations for searching.
Bonus: removed all "viewDidUnload" methods, because they are never called since iOS 6.
Set version number to 1.3.2 (15.12.1)