adding two function on index.php

fetch_districts used to fetch district, and fetch_region used to fetch
regions both function return an array
calling two fuction on main fetch school fetch query
changing index
changing index
changing index
updating region and district on index.php
factorizing index.php and  enabling zooming to school district
fixing school results chart

affected files school_fetcher, mapbox.jquery.geocoder
Merge pull request #1 from rafakingazi/master

updated index.php