Adds Webpack support and removes the use for Grunt

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

use scss

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

fix build, add babel, fix annotations

fixes (and improvements !) for baggy

add live reload & environments & eslint & theme fixes

app/config/webpack/dev.js

@@ -0,0 +1,62 @@
+const webpackMerge = require('webpack-merge');
+const webpack = require('webpack');
+const path = require('path');
+const commonConfig = require('./common.js');
+
+module.exports = function () {
+  return webpackMerge(commonConfig(), {
+    devtool: 'eval-source-map',
+    output: {
+      filename: '[name].dev.js'
+    },
+
+    devServer: {
+      hot: true,
+      // enable HMR on the server
+
+      contentBase: './web',
+      // match the output path
+    },
+    plugins: [
+      new webpack.HotModuleReplacementPlugin(),
+    ],
+    module: {
+      rules: [
+        {
+          enforce: 'pre',
+          test: /\.js$/,
+          loader: 'eslint-loader',
+          exclude: /node_modules/,
+        },
+        {
+          test: /\.js$/,
+          exclude: /(node_modules)/,
+          use: {
+            loader: 'babel-loader',
+            options: {
+              presets: ['env']
+            }
+          }
+        },
+        {
+          test: /\.(s)?css$/,
+          use: [
+            'style-loader',
+            {
+              loader: 'css-loader',
+              options: {
+                importLoaders: 1,
+              }
+            },
+          'postcss-loader',
+          'sass-loader'
+          ]
+        },
+        {
+          test: /\.(jpg|png|gif|svg|eot|ttf|woff|woff2)$/,
+          use: 'url-loader'
+        },
+      ]
+    },
+  })
+};