Small fixes to achieve reproducible build (#661)

* Typo in 'npm run dummy:spec'
* 'babel' package is deprecated, remove from dependencies
* Mention that 'react-dom' also needs to be in webpack.conf; fix typo

CONTRIBUTING.md

@@ -98,7 +98,7 @@ npm install --save "react-on-rails@../../react_on_rails"
 
 When you use a relative path, be sure to run the above `npm install` command whenever you change the node package for react-on-rails.
 
-Wihle we'd prefer to us `npm link`, we get errors. If you can figure out how to get `npm link react-on-rails` to work with this project, please file an issue or PR! This used to work with babel 5.
+While we'd prefer to use `npm link`, we get errors. If you can figure out how to get `npm link react-on-rails` to work with this project, please file an issue or PR! This used to work with babel 5.
 
 This is the error:
 
@@ -174,7 +174,7 @@ spec/dummy.
 # Optionally change default selenium_firefox driver
 export DRIVER=poltergeist
 cd <top level>
-npm dummy:spec
+npm run dummy:spec
 ```
 
 ### Run NPM JS tests

lib/generators/react_on_rails/templates/base/base/client/package.json.tt

@@ -14,7 +14,6 @@
   },
   "cacheDirectories": ["node_modules", "client/node_modules"],
   "dependencies": {
-    "babel": "^6.5.2",
     "babel-cli": "^6.18.0",
     "babel-core": "^6.21.0",
     "babel-loader": "^6.2.10",

spec/dummy/client/package.json

@@ -9,7 +9,6 @@
   "main": "js/app.js",
   "dependencies": {
     "autoprefixer": "^6.6.1",
-    "babel": "^6.5.2",
     "babel-cli": "^6.18.0",
     "babel-core": "^6.21.0",
     "babel-loader": "^6.2.10",