[ADF-845] breadcrumb root option added and style review (#1999)

* breadcrumb root option added and style review

* new breadcrumbs

* split onchange in a method

* update readme with a note for old pefix tag

demo-shell-ng2/config/webpack.common.js

@@ -64,7 +64,16 @@ module.exports = {
             },
             {
                 test: /\.component.scss$/,
-                use: ['to-string-loader', 'raw-loader', 'sass-loader']
+                use: [{
+                    loader: "to-string-loader"
+                }, {
+                    loader: "raw-loader"
+                }, {
+                    loader: "sass-loader",
+                    options: {
+                        includePaths: [ path.resolve(__dirname, '../../ng2-components/ng2-alfresco-core/styles')]
+                    }
+                }]
             },
             {
                 test: /\.(png|jpe?g|gif|svg|woff|woff2|ttf|eot|ico)$/,