added some missing changelog entries

CHANGELOG.md

@@ -34,8 +34,11 @@ Known issues:
 - A new `MGLAnnotationImage.enabled` property allows you to disable touch events on individual annotations. ([#2501](https://github.com/mapbox/mapbox-gl-native/pull/2501))
 - Fixed a rendering issue that caused one-way arrows along tile boundaries to point due east instead of in the direction of travel. ([#2530](https://github.com/mapbox/mapbox-gl-native/pull/2530))
 - Fixed an issue that prevented zoom level–dependent style properties from updating after zooming programmatically with animation. ([#2951](https://github.com/mapbox/mapbox-gl-native/pull/2951))
+- Performance and appearance improvements during annotation adds & removes. ([#1688](https://github.com/mapbox/mapbox-gl-native/issues/1688))
+- Overall improved performance during renders by not rendering faster than necessary. ([#1975](https://github.com/mapbox/mapbox-gl-native/issues/1975))
 - Fixed a rendering issue with styles that use the `background-pattern` property. ([#2531](https://github.com/mapbox/mapbox-gl-native/pull/2531))
 - Fixed a crash when reusing a single `MGLMapView` across multiple `UIViewController`s. ([#2969](https://github.com/mapbox/mapbox-gl-native/pull/2969))
+- Fixed a crash on iPod touch and other devices or simulators without a cell carrier. ([#2687](https://github.com/mapbox/mapbox-gl-native/issues/2687))
 - Eliminated flickering when opening and closing an overlay, such as an alert or action sheet. ([#2309](https://github.com/mapbox/mapbox-gl-native/pull/2309))
 - Labels can now line wrap on hyphens and other punctuation. ([#2598](https://github.com/mapbox/mapbox-gl-native/pull/2598))
 - A new delegate callback was added for observing taps to annotation callout views. ([#2596](https://github.com/mapbox/mapbox-gl-native/pull/2596))