Fixed couple of errors in docs.

docs/foreword.rst

@@ -9,7 +9,7 @@ What does Micro Mean?
 ---------------------
 
 The micro in microframework for me means on the one hand being small in
-size, complexity but on the other hand also that the complexity of the
+size and complexity but on the other hand also that the complexity of the
 applications that are written with these frameworks do not exceed a
 certain size.  A microframework like Flask sacrifices a few things in
 order to be approachable and to be as concise as possible.

docs/index.rst

@@ -5,7 +5,7 @@ Welcome to Flask
    :alt: The Flask Logo with Subtitle
    :align: right
 
-Welcome to Flask's documentation.  This documentation is divided into
+Welcome to Flask's documentation.  This documentation is divided in
 different parts.  I would suggest to get started with the
 :ref:`installation` and then heading over to the :ref:`quickstart`.  If
 you want to dive into all the internal parts of Flask, check out the

docs/installation.rst

@@ -14,7 +14,7 @@ templates.  Now you are maybe asking, what is WSGI?  WSGI is a standard
 in Python that is basically responsible for ensuring that your application
 is behaving in a specific way that you can run it on different
 environments (for example on a local development server, on an Apache2, on
-lighttpd, on Google's appengine or whatever you have in mind).
+lighttpd, on Google's App Engine or whatever you have in mind).
 
 So how do you get all that on your computer in no time?  The most kick-ass
 method is virtualenv, so let's look at that first.