Move top-level typedefs to typedefs.js

With one exception, those directly in the `ol` namespace can be moved without problem.
Some left-over goog.requires are also removed.

src/ol/geolocation.js

@@ -6,7 +6,6 @@ goog.provide('ol.GeolocationProperty');
 goog.require('ol.events');
 goog.require('ol.events.EventType');
 goog.require('ol.Object');
-goog.require('ol.TransformFunction');
 goog.require('ol.geom.Geometry');
 goog.require('ol.geom.Polygon');
 goog.require('ol.has');