Fixes/269 all google version

[reekypete]

This is fairly pluggable.

To switch between "all-google" and "mostly-mapbox" you just need to uncomment 2 lines in index.html:

<!-- script src="js/Leaflet.SchoolFilter.js"></script> -->
<script src="js/SchoolFilter.js"></script>
<!-- <script src="js/views/mapview.js"></script> -->
<script src="js/views/mapviewGoogle.js"></script>

[techieshark]

Superseded by #279; closing.