Rename translated to translation(addedTo:).

Summary: Closes #33

Reviewers: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, chuga

Reviewed By: O4 Material Apple platform reviewers, chuga

Tags: #material_motion

Differential Revision: http://codereview.cc/D2865

examples/SwipeExample.swift

@@ -75,7 +75,7 @@ class TossableStackedCard: Interaction {
     runtime.connect(drag.velocityOnReleaseStream(in: view).x(), to: attachment.initialVelocity)
     runtime.connect(destination, to: attachment.destination)
 
-    let draggable = drag.translated(from: reactiveView.center, in: relativeView).x()
+    let draggable = drag.translation(addedTo: reactiveView.center, in: relativeView).x()
     runtime.connect(draggable, to: reactiveView.centerX)
     runtime.connect(drag.atRest(), to: attachment.enabled)
     runtime.add(attachment, to: reactiveView.centerX)

src/interactions/Draggable.swift

@@ -41,7 +41,7 @@ extension Draggable: Interaction {
     let reactiveView = runtime.get(view)
     let gestureRecognizer = dequeueGestureRecognizer(withReactiveView: reactiveView)
     let position = reactiveView.reactiveLayer.position
-    var stream = runtime.get(gestureRecognizer).translated(from: position)
+    var stream = runtime.get(gestureRecognizer).translation(addedTo: position)
     if let applyConstraints = applyConstraints {
       stream = applyConstraints(stream)
     }

src/operators/gestures/translated.swift → src/operators/gestures/translationAddedTo.swift

@@ -22,7 +22,7 @@ extension MotionObservableConvertible where T: UIPanGestureRecognizer {
    Adds the current translation to the initial position and emits the result while the gesture
    recognizer is active.
    */
-  public func translated<O: MotionObservableConvertible>(from initialPosition: O, in view: UIView) -> MotionObservable<CGPoint> where O.T == CGPoint {
+  public func translation<O: MotionObservableConvertible>(addedTo initialPosition: O, in view: UIView) -> MotionObservable<CGPoint> where O.T == CGPoint {
     var cachedInitialPosition: CGPoint?
     var lastInitialPosition: CGPoint?
 

src/reactivetypes/ReactiveUIGestureRecognizer.swift

@@ -56,8 +56,8 @@ extension ReactiveUIGestureRecognizer {
 
 extension ReactiveUIGestureRecognizer where O: UIPanGestureRecognizer {
 
-  public func translated<O: MotionObservableConvertible>(from initialPosition: O) -> MotionObservable<CGPoint> where O.T == CGPoint {
-    return stream.whenRecognitionState(isAnyOf: [.began, .changed]).translated(from: initialPosition, in: containerView)
+  public func translation<O: MotionObservableConvertible>(addedTo initialPosition: O) -> MotionObservable<CGPoint> where O.T == CGPoint {
+    return stream.whenRecognitionState(isAnyOf: [.began, .changed]).translation(addedTo: initialPosition, in: containerView)
   }
   public func velocityOnReleaseStream() -> MotionObservable<CGPoint> {
     return stream.whenRecognitionState(is: .ended).velocity(in: containerView)