Merge pull request scrapinghub#35 from kienpham2000/command-params

accpeting params for command

Author: lins05

README.md

@@ -71,6 +71,20 @@ def github():
     }]
     message.send_webapi('', json.dumps(attachments))
 ```
+
+### Command Parameter Support
+
+If you would like to have a command like 'stats' and 'stats start_date end_date', you can create reg ex like so:
+
+```python
+from slackbot.bot import respond_to
+import re
+
+
+@respond_to('stat$', re.IGNORECASE)
+@respond_to('stat (.*) (.*)', re.IGNORECASE)
+def stats(message, start_date=None, end_date=None):
+```
 
 ## Plugins