update doc：add cython lib requirement before rqalpha has been installed

ricequant · Feb 13, 2017 · a90f47c · a90f47c
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commit a90f47c
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diff --git a/docs/source/intro/install.rst b/docs/source/intro/install.rst
@@ -25,6 +25,10 @@ Windows 环境下编译安装 bcolz 需要使用Visual C++ Compiler，需要自
 
     $ pip install -U pip setuptools
 
+安装 cython 库::
+
+    $ pip install cython
+
 安装 RQAlpha ::
 
     $ pip install rqalpha