Add webpack; Setup instructions

webpack.config.js

@@ -0,0 +1,34 @@
+var path = require("path");
+var webpack = require("webpack");
+
+module.exports = {
+  entry: [ "./src/glue/js.ts", "./src/index.ts" ],
+  module: {
+    rules: [
+      {
+        test: /\.ts$/,
+        use: "ts-loader",
+        exclude: /node_modules/
+      }
+    ]
+  },
+  externals: [ "binaryen" ],
+  resolve: {
+    extensions: [ ".ts", ".js" ]
+  },
+  output: {
+    filename: "assemblyscript.js",
+    path: path.resolve(__dirname, "dist"),
+    library: "assemblyscript",
+    libraryTarget: "umd"
+  },
+  plugins: [
+    new webpack.optimize.UglifyJsPlugin({
+      minimize: true,
+      sourceMap: true
+    }),
+    new webpack.SourceMapDevToolPlugin({
+      filename: "assemblyscript.js.map"
+    })
+  ]
+}