Move notify_map_change() from a global callback, to a callback in

View.

This allows for their to me more than one Map object alive at a
time.

Fixes mapbox/mapbox-gl-native#346

Conflicts:
	common/glfw_view.hpp
	include/llmr/map/view.hpp
	include/mbgl/map/transform.hpp
	src/map/map.cpp
	src/map/transform.cpp
	test/headless.cpp

src/map/map.cpp

@@ -156,7 +156,6 @@ void Map::cleanup(uv_async_t *async) {
 void Map::terminate() {
     view.make_active();
     painter.terminate();
-    view.make_inactive();
 }
 
 void Map::render(uv_async_t *async) {