typo fixes (#187)

Author: livash

lessons/02-rendering-a-route/README.md

@@ -66,6 +66,7 @@ export default React.createClass({
 Now we can couple them to the app at their respective paths.
 
 ```js
+// insert into index.js
 import About from './modules/About'
 import Repos from './modules/Repos'
 

lessons/05-active-links/README.md

@@ -21,6 +21,7 @@ Now as you navigate, the active link is red.
 You can also use an active class name instead of inline-styles.
 
 ```js
+// modules/App.js
 <li><Link to="/about" activeClassName="active">About</Link></li>
 <li><Link to="/repos" activeClassName="active">Repos</Link></li>
 ```
@@ -29,6 +30,7 @@ We don't have a stylesheet on the page yet though. Lets add one-extra
 point if you can add a `link` tag from memory.
 
 ```html
+// index.html
 <link rel="stylesheet" href="index.css" />
 ```
 
@@ -71,7 +73,7 @@ export default React.createClass({
 Now you can go change your links to `NavLink`s.
 
 ```js
-// App.js
+// modules/App.js
 import NavLink from './NavLink'
 
 // ...

lessons/08-index-routes/README.md

@@ -19,7 +19,7 @@ One option is to see if we have any children in `App`, and if not,
 render `Home`:
 
 ```js
-// App.js
+// modules/App.js
 import Home from './Home'
 
 // ...

lessons/10-clean-urls/README.md

@@ -53,7 +53,7 @@ starts at a deep path, won't be able to find the files.
 ```html
 <!-- index.html -->
 <!-- index.css -> /index.css -->
-<link rel=stylesheet href=/index.css>
+<link rel="stylesheet" href="/index.css">
 
 <!-- bundle.js -> /bundle.js -->
 <script src="/bundle.js"></script>

lessons/12-navigating/README.md

@@ -52,7 +52,7 @@ First we can use the `browserHistory` singleton that we passed into
 `Router` in `index.js` and push a new url into the history.
 
 ```js
-// Repos.js
+// modules/Repos.js
 import { browserHistory } from 'react-router'
 
 // ...