- Removes nullability shims for Xcode 6.
- Removes MGLTypes.h from files where it was only being used for
nullability support.
- Accepts that `NS_SWIFT_NAME` is not fully supported by Xcode 7.2 and
lower.
- Adds documentation about Xcode 7.3 requirement.
Reorganized MGLMapViewDelegate and MGLAnnotationView symbols into sections by task. Wrapped documentation comments at column 80 for readability.
Added documentation for -mapViewWillStartRenderingFrame: and -mapViewDidFinishRenderingFrame:fullyRendered:, which are supported and behave as expected (except for the part that has been left undocumented). Synchronized iOS and macOS documentation for MGLMapViewDelegate. Added cross-references between annotation image and annotation view delegate methods and among the various callout delegate methods.
Added missing MGLAnnotationViewDragState documentation and also added the symbol to jazzy’s table of contents. Rewrote MGLAnnotationView documentation.
