Removed root .babelrc file, upgrades

- Upgraded packages
- Fixed sourcemaps
- Moved .babelrc config into client folder
- Created .babelrc in tests folder for client tests

webpack.config.js

@@ -17,7 +17,7 @@ const buildEmbeds = [
 ];
 
 module.exports = {
-  devtool: '#cheap-module-source-map',
+  devtool: 'cheap-module-source-map',
   entry: Object.assign({}, {
     'embed': [
       'babel-polyfill',
@@ -58,8 +58,7 @@ module.exports = {
         exclude: /node_modules/,
         test: /\.js$/,
         query: {
-          cacheDirectory: true,
-          sourceMap: true
+          cacheDirectory: true
         }
       },
       {