refactor[core]: use webpack-dev-server now (#355)

* bump deps: update vue-splitpane version

* refactor[chore]: use webpack-dev-serve build

* perf:settings

* doc: uodate readme

build/vue-loader.conf.js

@@ -1,12 +1,22 @@
-var utils = require('./utils')
-var config = require('../config')
-var isProduction = process.env.NODE_ENV === 'production'
+'use strict'
+const utils = require('./utils')
+const config = require('../config')
+const isProduction = process.env.NODE_ENV === 'production'
+const sourceMapEnabled = isProduction
+  ? config.build.productionSourceMap
+  : config.dev.cssSourceMap
 
 module.exports = {
-    loaders: utils.cssLoaders({
-        sourceMap: isProduction
-            ? config.build.productionSourceMap
-            : config.dev.cssSourceMap,
-        extract: isProduction
-    })
+  loaders: utils.cssLoaders({
+    sourceMap: sourceMapEnabled,
+    extract: isProduction
+  }),
+  cssSourceMap: sourceMapEnabled,
+  cacheBusting: config.dev.cacheBusting,
+  transformToRequire: {
+    video: ['src', 'poster'],
+    source: 'src',
+    img: 'src',
+    image: 'xlink:href'
+  }
 }