schema: refactor PlotSchame.get

- remove _nestedModule and _composedModule handlers
- find module attribute from registry (as opposed to the
  internal Plotly object and other obsolete methods)
- add layoutNodes to better handler rangeslider and rangeselector

Author: etpinard

src/components/rangeselector/index.js

@@ -8,13 +8,13 @@
 
 'use strict';
 
+module.exports = {
+    moduleType: 'component',
+    name: 'rangeselector',
 
-exports.moduleType = 'component';
+    layoutNodes: ['xaxis.'],
+    layoutAttributes: require('./attributes'),
+    handleDefaults: require('./defaults'),
 
-exports.name = 'rangeselector';
-
-exports.layoutAttributes = require('./attributes');
-
-exports.handleDefaults = require('./defaults');
-
-exports.draw = require('./draw');
+    draw: require('./draw')
+};

src/components/rangeslider/index.js

@@ -11,7 +11,10 @@
 module.exports = {
     moduleType: 'component',
     name: 'rangeslider',
+
+    layoutNodes: ['xaxis.'],
     layoutAttributes: require('./attributes'),
     handleDefaults: require('./defaults'),
+
     draw: require('./draw')
 };