Remove broken downloads badge

See https://github.com/badges/shields/issues/716.

Also fix typo.

README.md

@@ -4,7 +4,7 @@ Tweepy: Twitter for Python!
 [![Join the chat at https://gitter.im/tweepy/tweepy](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/tweepy/tweepy?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Build Status](http://img.shields.io/travis/tweepy/tweepy/master.svg?style=flat)](https://travis-ci.org/tweepy/tweepy)
 [![Documentation Status](http://img.shields.io/badge/docs-v3.6.0-brightgreen.svg?style=flat)](http://docs.tweepy.org)
-[![Downloads](http://img.shields.io/pypi/dm/tweepy.svg?style=flat)](https://crate.io/packages/tweepy) [![Version](http://img.shields.io/pypi/v/tweepy.svg?style=flat)](https://crate.io/packages/tweepy)
+[![Version](http://img.shields.io/pypi/v/tweepy.svg?style=flat)](https://crate.io/packages/tweepy)
 [![Coverage Status](https://img.shields.io/coveralls/tweepy/tweepy/master.svg?style=flat)](https://coveralls.io/r/tweepy/tweepy?branch=master)
 
 Installation
@@ -15,7 +15,7 @@ is by using pip/easy_install to pull it from PyPI:
     pip install tweepy
 
 You may also use Git to clone the repository from
-Github and install it manually:
+GitHub and install it manually:
 
     git clone https://github.com/tweepy/tweepy.git
     cd tweepy