Fix typos

README.md

@@ -15,7 +15,7 @@ While developing an HTML5 application, did you anticipate uncommon user interact
 
 Gremlins.js simulates random user actions: gremlins click anywhere in the window, enter random data in forms, or move the mouse over elements that don't expect it. Their goal: triggering JavaScript errors, or making the application fail. If gremlins can't break an application, congrats! The application is robust enough to be released to real users.
 
-This practice, also known as [Monkey testing](http://en.wikipedia.org/wiki/Monkey_test), is very common in mobile application development (see for instance the [Android Monkey program](http://developer.android.com/tools/help/monkey.html)). Now that frontend (MV*, d3.js, Backbone.js, Angular.js, etc.) and backend (Node.js) development uses persistent JavaScript applications, this technique becomes valuable for web applications.
+This practice, also known as [Monkey testing](http://en.wikipedia.org/wiki/Monkey_test), is very common in mobile application development (see for instance the [Android Monkey program](http://developer.android.com/tools/help/monkey.html)). Now that frontend (MV*, d3.js, Backbone.js, Angular.js, etc.) and backend (Node.js) development use persistent JavaScript applications, this technique becomes valuable for web applications.
 
 ## Basic Usage
 
@@ -58,7 +58,7 @@ mogwai  fps  15.76
 ...
 ```
 
-After 10 errors, a special mogwai stops the test. He's called *Gizmo*, and he prevents gremlins from breaking applications bad. After all, once gremlins have found the first 10 errors, you already know what you do to make your application more robust.
+After 10 errors, a special mogwai stops the test. He's called *Gizmo*, and he prevents gremlins from breaking applications bad. After all, once gremlins have found the first 10 errors, you already know what you have to do to make your application more robust.
 
 Gremlins, just like mogwais, are simple JavaScript functions. If `gremlins.js` doesn't provide the gremlin that can break your application, it's very easy to develop it: