update readme

Author: jachinlin

README.md

@@ -3,8 +3,13 @@
 [![travis](https://travis-ci.org/jachinlin/geektime_dl.svg?branch=master)](https://travis-ci.org/jachinlin/geektime_dl)
 [![codecov](https://codecov.io/gh/jachinlin/geektime_dl/branch/master/graph/badge.svg)](https://codecov.io/gh/jachinlin/geektime_dl)
 [![Python 3](https://img.shields.io/badge/python-3-blue.svg)](https://www.python.org/downloads/release/python-356/)
+[![PyPI - Downloads](https://img.shields.io/pypi/dd/geektime-dl.svg)](https://pypi.org/project/geektime-dl/)
+[![PyPI](https://img.shields.io/pypi/v/geektime-dl.svg)](https://pypi.org/project/geektime-dl/)
 
-<img src="https://raw.githubusercontent.com/jachinlin/jachinlin.github.io/master/img/gk-mp4.gif" alt="左耳听风">
+
+<p align="center" style="margin:70px">
+    <img src="https://raw.githubusercontent.com/jachinlin/jachinlin.github.io/master/img/gk-mp4.gif" alt="左耳听风">
+</p>
 
 极客时间专栏文章的质量都是非常高的，比如耗子哥的《左耳听风》、朱赟的《朱赟的技术管理课》和王天一的《人工智能基础课》，都是我非常喜欢的专栏。这些专栏深入浅出，将知识和经验传授于读者，都是值得多次阅读的。
 
@@ -17,7 +22,7 @@
 
 ## 一、项目结构
 
-<p align="center">
+<p align="center" style="margin:70px">
     <img src="https://github.com/jachinlin/jachinlin.github.io/blob/master/img/gk-chart.png?raw=true" alt="流程图">
 </p>
 
@@ -56,7 +61,7 @@
 
 #### 虚拟环境 virtualenv
 ```
-cd ~ && virtualenv -p python3 venv3 && source venv3/bin/activate
+virtualenv -p python3 ~/venv3 && source ~/venv3/bin/activate
 ```
 
 #### 代码

setup.py

@@ -3,7 +3,7 @@
 
 from setuptools import setup, find_packages
 
-version = 2.0
+version = 2.1
 
 setup(
     name='geektime_dl',