Rename some targets in the Makefile.
Add randomStr(len = 10) helper.
Add simple GoogleMap component.

This component displays a map center at some location, and adds one marker at the center of the map.
Add shape and question of type 'Geo'.
Tell JSHint about window.google.
Add a Geo question component.
Pass the marker's position upwards on drag end.
Show only relevant controls.
Fix typo in Makefile.
Make JSHint happy unil version 3.
Add propTypes to <GoogleMaps />.