Speed up build (#1852)

* single build webpack

* fix demo shell test

ng2-components/config/custom-loaders/file-loader-multi.js

@@ -0,0 +1,70 @@
+var path = require('path');
+var loaderUtils = require('loader-utils');
+
+module.exports = function(content) {
+    this.cacheable && this.cacheable();
+    if(!this.emitFile) throw new Error('emitFile is required from module system');
+
+    var query = loaderUtils.getOptions(this) || {};
+    var configKey = query.config || 'multiFileLoader';
+    var options = this.options[configKey] || {};
+    var config = {
+        publicPath: false,
+        useRelativePath: false,
+        name: '[hash].[ext]'
+    };
+
+    // options takes precedence over config
+    Object.keys(options).forEach(function(attr) {
+        config[attr] = options[attr];
+    });
+
+    // query takes precedence over config and options
+    Object.keys(query).forEach(function(attr) {
+        config[attr] = query[attr];
+    });
+
+    var context = config.context || this.options.context;
+    var url = loaderUtils.interpolateName(this, config.name, {
+        context: context,
+        content: content,
+        regExp: config.regExp
+    });
+    var path = loaderUtils.interpolateName(this, '[path]', {
+        context: context,
+        content: content,
+        regExp: config.regExp
+    });
+
+    var outputPath = '';
+
+    if (config.outputPath) {
+        outputPath = (
+            typeof config.outputPath === 'function'
+                ? config.outputPath(url, path)
+                : config.outputPath + url
+        );
+    } else {
+        outputPath = url;
+    }
+
+    var publicPath = JSON.stringify(url);
+
+    if (config.publicPath) {
+        publicPath = JSON.stringify(
+            typeof config.publicPath === 'function'
+                ? config.publicPath(url, path)
+                : config.publicPath + url
+        );
+    }
+
+    publicPath = '__webpack_public_path__ + ' + publicPath;
+
+    if (query.emitFile === undefined || query.emitFile) {
+        this.emitFile(outputPath, content);
+    }
+
+    return 'module.exports = ' + publicPath + ';';
+};
+
+module.exports.raw = true;