docs: add installation

ydl · ydl · commit 8ab6986f3cbf · 2019-04-30T18:36:05.000+08:00
diff --git a/README.md b/README.md
@@ -22,6 +22,14 @@ copy&ndash;paste from :)
 
 ![image]
 
+Installation
+-----
+
+```bash
+cd your_project
+wget https://raw.githubusercontent.com/kennethreitz/setup.py/master/setup.py -O setup.py
+```
+
 To Do
 -----
 
