Merge pull request #10 from uupers/nodeapp

reverse log; disable button on click;

app/assets/css/style.css

@@ -3,4 +3,10 @@
 }
 .text-centered {
    text-align: center;
+}
+
+#log-pre {
+   height: auto;
+   max-height: 200px;
+   overflow: auto
 }

app/assets/vue/README.md

@@ -0,0 +1,124 @@
+## Explanation of Build Files
+
+| | UMD | CommonJS | ES Module |
+| --- | --- | --- | --- |
+| **Full** | vue.js | vue.common.js | vue.esm.js |
+| **Runtime-only** | vue.runtime.js | vue.runtime.common.js | vue.runtime.esm.js |
+| **Full (production)** | vue.min.js | | |
+| **Runtime-only (production)** | vue.runtime.min.js | | |
+
+### Terms
+
+- **Full**: builds that contains both the compiler and the runtime.
+
+- **Compiler**: code that is responsible for compiling template strings into JavaScript render functions.
+
+- **Runtime**: code that is responsible for creating Vue instances, rendering and patching virtual DOM, etc. Basically everything minus the compiler.
+
+- **[UMD](https://github.com/umdjs/umd)**: UMD builds can be used directly in the browser via a `<script>` tag. The default file from Unpkg CDN at [https://unpkg.com/vue](https://unpkg.com/vue) is the Runtime + Compiler UMD build (`vue.js`).
+
+- **[CommonJS](http://wiki.commonjs.org/wiki/Modules/1.1)**: CommonJS builds are intended for use with older bundlers like [browserify](http://browserify.org/) or [webpack 1](https://webpack.github.io). The default file for these bundlers (`pkg.main`) is the Runtime only CommonJS build (`vue.runtime.common.js`).
+
+- **[ES Module](http://exploringjs.com/es6/ch_modules.html)**: ES module builds are intended for use with modern bundlers like [webpack 2](https://webpack.js.org) or [rollup](http://rollupjs.org/). The default file for these bundlers (`pkg.module`) is the Runtime only ES Module build (`vue.runtime.esm.js`).
+
+### Runtime + Compiler vs. Runtime-only
+
+If you need to compile templates on the fly (e.g. passing a string to the `template` option, or mounting to an element using its in-DOM HTML as the template), you will need the compiler and thus the full build.
+
+When using `vue-loader` or `vueify`, templates inside `*.vue` files are compiled into JavaScript at build time. You don't really need the compiler in the final bundle, and can therefore use the runtime-only build.
+
+Since the runtime-only builds are roughly 30% lighter-weight than their full-build counterparts, you should use it whenever you can. If you wish to use the full build instead, you need to configure an alias in your bundler.
+
+#### Webpack
+
+``` js
+module.exports = {
+  // ...
+  resolve: {
+    alias: {
+      'vue$': 'vue/dist/vue.esm.js' // 'vue/dist/vue.common.js' for webpack 1
+    }
+  }
+}
+````
+
+#### Rollup
+
+``` js
+const alias = require('rollup-plugin-alias')
+
+rollup({
+  // ...
+  plugins: [
+    alias({
+      'vue': 'vue/dist/vue.esm.js'
+    })
+  ]
+})
+```
+
+#### Browserify
+
+Add to your project's `package.json`:
+
+``` js
+{
+  // ...
+  "browser": {
+    "vue": "vue/dist/vue.common.js"
+  }
+}
+```
+
+### Development vs. Production Mode
+
+Development/production modes are hard-coded for the UMD builds: the un-minified files are for development, and the minified files are for production.
+
+CommonJS and ES Module builds are intended for bundlers, therefore we don't provide minified versions for them. You will be responsible for minifying the final bundle yourself.
+
+CommonJS and ES Module builds also preserve raw checks for `process.env.NODE_ENV` to determine the mode they should run in. You should use appropriate bundler configurations to replace these environment variables in order to control which mode Vue will run in. Replacing `process.env.NODE_ENV` with string literals also allows minifiers like UglifyJS to completely drop the development-only code blocks, reducing final file size.
+
+#### Webpack
+
+Use Webpack's [DefinePlugin](https://webpack.js.org/plugins/define-plugin/):
+
+``` js
+var webpack = require('webpack')
+
+module.exports = {
+  // ...
+  plugins: [
+    // ...
+    new webpack.DefinePlugin({
+      'process.env': {
+        NODE_ENV: JSON.stringify('production')
+      }
+    })
+  ]
+}
+```
+
+#### Rollup
+
+Use [rollup-plugin-replace](https://github.com/rollup/rollup-plugin-replace):
+
+``` js
+const replace = require('rollup-plugin-replace')
+
+rollup({
+  // ...
+  plugins: [
+    replace({
+      'process.env.NODE_ENV': JSON.stringify('production')
+    })
+  ]
+}).then(...)
+```
+
+#### Browserify
+
+Apply a global [envify](https://github.com/hughsk/envify) transform to your bundle.
+
+``` bash
+NODE_ENV=production browserify -g envify -e main.js | uglifyjs -c -m > build.js
+```