Make the `build/check-requires-timestamp` target work with namespace provides in cases where the namespace provide isn't required by a module that provides constructors or other objects within that namespace. This may seem a bit odd, but if I want to provide `foo.bar.Bam` it isn't strictly necessary that my module require `foo.bar`.
To make this build target work, we stick with the following convention (used in the Closure Library):
* If you want to make a function available via `goog.require`, use `goog.provide` to provide the object of which the function is a member (e.g. to make the `foo.bar.baz` function available, use `goog.provide('foo.bar')`).
This commit changes the examples to using ol.control.defaults().extend to extend the collection of controls. This is in preparation for a future commit that will remove the 2nd argument to ol.control.defaults. The same is done for ol.interaction.defaults.
Setting the renderer of the ten-thousand-points example to
WebGL should remove the need for this stub. This is basically
the same approach we took for all vector examples in master,
where we set the renderer to Canvas.
