Plumbed camera options all the way through to MGLMapView. Added a method that lets you specify a direction in addition to center point and zoom level.
Added Map::jumpTo() for parity with mapbox-gl-js. Replaced usage of Map::setLatLng() and Map::setLatLngZoom() with Map::jumpTo() or Map::easeTo() within MGLMapView. Replaced MGLMapView.pitch with MGLMapCamera for setting all supported degrees of freedom simultaneously. Simultaneously move and rotate with course.
Support customizable timing functions on iOS.
iosapp now persists an archived MGLMapCamera instead of separate viewpoint properties and also synchronizes user defaults on termination. This change implements persistence entirely in Objective-C, eliminating the use of the Objective-C++ implementation.
Fixes#1643, fixes#1834. Ref #1581.
this will make it easier to add more targets to iOS builds in the future. It'll also help by having Xcode files named after the platform they're for, so it's easier to distinguish windows
