Update README.md

依赖说明

Author: tttwwy

README.md

@@ -1,3 +1,21 @@
-rss
-===
+##**简介**
 将微信公众号的订阅内容转换成RSS格式订阅，以便在RSS阅读器上查看
+
+##**工具依赖**
+ 1. phantomjs 
+
+    ```shell
+    cd /usr/local/share
+    sudo wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-1.9.7-linux-x86_64.tar.bz2
+    sudo tar xjf phantomjs-1.9.7-linux-x86_64.tar.bz2
+    sudo ln -s /usr/local/share/phantomjs-1.9.7-linux-x86_64/bin/phantomjs /usr/local/share/phantomjs
+    sudo ln -s /usr/local/share/phantomjs-1.9.7-linux-x86_64/bin/phantomjs /usr/local/bin/phantomjs
+    sudo ln -s /usr/local/share/phantomjs-1.9.7-linux-x86_64/bin/phantomjs /usr/bin/phantomjs
+    ```
+
+ 2. selenium
+
+    ```shell
+    sudo pip install -U selenium
+    ```
+