Improve readme

README.rst

@@ -1,38 +1,38 @@
 API Usage
 =========
 
-Create a Xunlei object
+Create a Xunlei object::
 
     import xunlei
     xunlei_obj = xunlei.Xunlei(USERNAME, PASSWORD, COOKIE_FILE_PATH)
 
-List Xunlei lixian tasks
+List Xunlei lixian tasks::
 
     items = xunlei_obj.dashboard()
 
-List a bittorrent task
+List a bittorrent task::
 
     items = xunlei_obj.list_bt(url, task_id) # url and task_id are from dashboard() function
 
-Download a task
+Download a task::
 
     xunlei_obj.dowload(url, filename)
 
-Download a task with file size checking and resume
+Download a task with file size checking and resume::
 
     xunlei_obj.smart_download(url, filename, size)
 
 
 CLI Usage
 =========
 
-Edit config file at `~/xunleirc`, add settings for `username` and `password`
+Edit config file at ``~/xunleirc``, add settings for ``username`` and ``password``
 
-List xunlei tasks
+List xunlei tasks::
 
     xunlei_cli dashboard
 
-Download a task
+Download a task::
 
     xunlei_cli download TASK_ID