Only get latest reversion for speed-up the clone at Install

chusiang · chusiang · commit e4d00c36b0d6 · 2018-03-19T02:25:02.000+08:00
diff --git a/README.rst b/README.rst
@@ -53,7 +53,7 @@ Linux & Mac OSX
 
   ::
 
-      git clone https://github.com/chusiang/vimrc.git
+      git clone https://github.com/chusiang/vimrc.git --depth=1
 
 * Install.
 
