Documentation Update

Summary: The first change is to remove the word 'Hybrid' to a lot of javascript developers the word Hybrid is normally referred to as a webview app (such as Cordova) and this may cause confusion.

The second change is to refer to the property within Navigator that allows a scene to be presented from the bottom of the screen (like a modal).
Closes facebook#3173

Reviewed By: svcscm

Differential Revision: D2561886

Pulled By: javache

fb-gh-sync-id: e37e5d06869ffadc152abaf304f77c93b81f71a3

Libraries/Modal/Modal.js

@@ -29,7 +29,8 @@ var RCTModalHostView = requireNativeComponent('RCTModalHostView', null);
  *
  * In apps written with React Native from the root view down, you should use
  * Navigator instead of Modal. With a top-level Navigator, you have more control
- * over how to present the modal scene over the rest of your app.
+ * over how to present the modal scene over the rest of your app by using the
+ * configureScene property.
  */
 class Modal extends React.Component {
   render(): ?ReactElement {