Invalidate layer tree on component update.

Fixes Flipboard#40

Author: Michael Johnston

lib/Image.js

@@ -34,6 +34,7 @@ var RawImage = createComponent('Image', LayerMixin, {
  var props = nextComponent.props;
  this.applyLayerProps(prevProps, props);
  this._currentElement = nextComponent;
+ this.node.invalidateLayout();
  },
 
 });

lib/Layer.js

@@ -17,6 +17,7 @@ var Layer = createComponent('Layer', LayerMixin, {
  var props = nextComponent.props;
  this.applyLayerProps(prevProps, props);
  this._currentElement = nextComponent;
+ this.node.invalidateLayout();
  }
 
 });

lib/Text.js

@@ -33,6 +33,7 @@ var Text = createComponent('Text', LayerMixin, {
  this.applyLayerProps(prevProps, props);
  this.applyTextProps(prevProps, props);
  this._currentElement = nextComponent;
+ this.node.invalidateLayout();
  }
 
 });