contrib_bots: Expose some information about user profile

- Expose some information about user profile in `RestrictedClient`
class, like `full_name` and `email` of the user.

- Add `client` argument to `triage_message()`, now it's possible to
call bot with another method instead of calling the specified
keyword.

contrib_bots/lib/howdoi_bot.py

@@ -56,7 +56,7 @@ class HowdoiHandler(object):
                 * @howdowe! OR @howdoi! > Full answer from SO
             '''
 
-    def triage_message(self, message):
+    def triage_message(self, message, client):
         cmd_list = ['@howdowe', '@howdoi', '@howdowe!', '@howdoi!']
         question = message['content']